JP7373458B2 - Decorative panel structure - Google Patents

Description

The present invention relates to a decorative panel structure .

Conventionally, a heater-equipped emblem (decorative panel structure) that transmits radar waves (millimeter waves) for autocruise is known (see, for example, Patent Document 1). This emblem is located approximately at the center of the front grille in the vehicle width direction, and allows millimeter waves emitted from the rear millimeter wave radar device to pass through. This emblem suppresses the attenuation of radar waves (millimeter waves) caused by snow by removing the snow that has adhered to it using a heater.

JP2017-215242A

By the way, conventional emblems (for example, see Patent Document 1) have a problem in that snow adhering to the emblems cannot be sufficiently removed when the temperature drops significantly, especially in cold regions. Therefore, it may be possible to increase the wiring density of heating wires in the emblem in order to increase the amount of heat generated by the heater.
However, when the wiring density of heating wires in the emblem is increased, the transmission performance of radar waves (millimeter waves) in the emblem is reduced. Therefore, there is a demand for an emblem (decorative panel structure) that can efficiently melt snow while having good radar wave (millimeter wave) transmission performance.

An object of the present invention is to provide a decorative panel structure that can efficiently melt snow while having good radar wave transmission performance.

The decorative panel structure of the present invention that solves the above problems is a decorative panel structure including an electric heating layer, and includes a panel-shaped transparent cover member arranged on the front side of the decorative panel structure, and a back side of the transparent cover member. a decoration member that can transmit radar waves and is bonded to the heating layer, the electric heating layer is arranged along the surface direction between the front and back of the decorative panel structure, and the electric heating layer is closer to the back side of the decorative panel structure than the electric heating layer. further includes a heat insulating layer that insulates heat from the electric heating layer, and the decorative member is fitted and joined to a recess formed on the back surface of the transparent cover member via an adhesive, and the The adhesive layer also serves as the heat insulating layer, and the adhesive layer is formed over the entire back side of the transparent cover member, and is formed on the back side of the transparent cover member except for the recess. It further includes a colored layer, and the adhesive applied to the recess and the adhesive applied to the back side of the transparent cover member via the colored layer are photothermosetting silicone adhesives. shall be.

According to the present invention, it is possible to provide a decorative panel structure that can efficiently melt snow while having good radar wave transmission performance.

FIG. 2 is a partially enlarged front view of the front portion of a vehicle body having a decorative panel structure (emblem) according to an embodiment of the present invention. FIG. 2 is a partially enlarged front view of FIG. 1 with the front grill omitted. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 3 is a sectional view taken along line IV-IV in FIG. 2. FIG. It is a process explanatory diagram of the manufacturing method of the decorative panel structure (emblem) based on embodiment of this invention, and is a process explanatory diagram of forming an electrothermal layer on a transparent cover member. It is a process explanatory diagram of the manufacturing method of the decorative panel structure (emblem) based on embodiment of this invention, and is a process explanatory diagram of forming the coating film (decoration layer) of a colored resin on a transparent cover member. It is a process explanatory diagram of the manufacturing method of the decorative panel structure (emblem) based on embodiment of this invention, and is a process explanatory diagram of forming an adhesive layer on a transparent cover member. It is a process explanatory diagram of the manufacturing method of the decorative panel structure (emblem) based on embodiment of this invention, and is a process explanatory diagram of providing a metallic-looking decorative film (metallic-looking decorative layer) to the surface of a base member. FIG. 5D is a partially enlarged view schematically showing the surface of the indium film that constitutes the metallic decorative film in FIG. 5D. 5D is a partially enlarged view corresponding to the Vf section in FIG. 5D, and is a diagram showing the cut position of the metallic decorative film. FIG. It is a process explanatory view of the manufacturing method of the decoration panel structure (emblem) based on embodiment of this invention, and is a process explanatory view of fitting a decoration member into the recessed part of a transparent cover member.

Next, a decorative panel structure according to a mode for carrying out the present invention (this embodiment) and a method for manufacturing the same will be described in detail with reference to the drawings as appropriate.
In the following, a vehicle emblem having the decorative panel structure of this embodiment will be explained as an example, and then a method for manufacturing this emblem will be explained. In addition, the front-rear, up-down directions in the following description are based on the front-rear, up-down directions of the vehicle body to which the emblem is attached.
The emblem of this embodiment is an example of a decorative panel structure, and as will be explained in detail later, it is a decorative panel structure including an electric heating layer, and a heat insulating layer is provided closer to the back side of the decorative panel structure than the electric heating layer. The main feature is that it has layers. Therefore, the present invention is not limited to this emblem, but can be applied to various decorative panel structures having such features.

<Emblem>
FIG. 1 is a partially enlarged front view of the front portion of a vehicle body having an emblem 1 (decorative panel structure) according to the present embodiment. FIG. 2 is a partially enlarged front view of FIG. 1 with the front grill omitted. FIG. 3 is a cross-sectional view taken along line III--III in FIG.
As shown in FIG. 1, the emblem 1 is disposed approximately at the center in the vehicle width direction of a front grill (also referred to as a radiator grill) 20 disposed at the front of the vehicle body.
Such an emblem 1 is attached to the back surface of the front grill 20 via a support portion (not shown).

The front grill 20 is arranged in front of a front bulkhead (not shown) and is provided on the upper part of the front bumper face 21.
The emblem 1 in this embodiment has an elliptical pattern portion 14 facing forward (on the near side of the paper in FIG. 1) through the opening frame 20a of the front grill 20.
Further, a portion of the emblem 1 in this embodiment that is arranged behind the front grille 20 and is hidden is indicated by a hidden line (dotted line) in FIG.

As shown in FIG. 2 in which the front grill 20 is omitted, the emblem 1 in this embodiment has a substantially rectangular shape when viewed from the front of the vehicle body.
In addition, in FIG. 2, the pattern portion 14 of the emblem 1 is drawn with a solid line to indicate the electric heating layer 4 (see FIG. 3) located in front of the pattern portion 14 (on the near side of the page of FIG. 2). For convenience of drawing, it is shown as a thin hidden line (dotted line). Further, the heating wire 4a and the terminal 4b shown by thick hidden lines (dotted lines) in FIG. 2 constitute the heating layer 4. Further, in FIG. 2, reference numeral 4d represents a conductive paste that electrically connects the terminal 4b and a connector pin 4c (see FIG. 4) to be described later.

As shown in FIG. 3, a radar device 22 shown by an imaginary line (two-dot chain line) is arranged behind the emblem 1 through a front grill 20 (see FIG. 1), which is not shown. This radar device 22 is attached to the rear surface of the front grill 20 (see FIG. 1) via a radar mount (not shown).
Incidentally, the radar device 22 in this embodiment is assumed to be one that emits radar waves (millimeter waves) with a wavelength of about 1 to 10 mm, for example, toward the front of the vehicle, but is not limited to this. Then, the radar device 22 outputs such a transmission wave, and receives the reflected wave reflected by the corresponding object using a plurality of receiving antennas using an electronic scanning method. As a result, the radar device 22 provides the reception results of the reflected waves to an auto cruise system (not shown).

As shown in FIG. 3, the emblem 1 through which such radar waves (millimeter waves) can pass includes a transparent cover member 2 provided with an electric heating layer 4, a decoration member 3, and a back member 5. The Lord is preparing. The emblem 1 further includes a first decorative layer 6, a second decorative layer 7, and an adhesive layer 8 at predetermined positions described below.

(Transparent cover member)
As shown in FIG. 3, the transparent cover member 2 provided with the electric heating layer 4 is arranged so as to occupy most of the front surface of the emblem 1, except for a back surface member 5 (described later) that frames the outer circumference of the emblem 1. There is.
Incidentally, according to such a transparent cover member 2, as shown in FIG. The decorative member 3 (second decorative layer 7) bonded to the back surface (rear surface) of the transparent cover member 2 can be seen through.

That is, in FIG. 1, the first decorative layer 6 and the decorative member 3 (the The second decorative layer 7) is shown.
In FIG. 2, the transparent cover member 2 in this embodiment has a substantially rectangular planar shape on the inside of the back surface member 5 that borders the outer circumference of the substantially rectangular emblem 1.
As shown in FIG. 3, a step-like step 11 is formed on the outer peripheral portion of such a transparent cover member 2. As shown in FIG. As will be described later, the outer peripheral portion of the back member 5 is integrally molded into the step 11 so as to fit into it from the outside.

(Electric heating layer)
Next, the electric heating layer 4 (see FIG. 3) will be explained.
As shown in FIG. 3, the electric heating layer 4 is provided on the surface of the transparent cover member 2. As shown in FIG. The heating layer 4 is transparent and includes the heating wire 4a described above.
In addition, in FIG. 3, the heating wire 4a is exaggerated for convenience of drawing, and the cross-sectional shape, cross-sectional area, position in the heating layer 4, etc. of the heating wire 4a are different from the actual one. .

The electric heating layer 4 in this embodiment is formed of a film heater attached to the surface of the transparent cover member 2. Incidentally, the film heater in this embodiment is assumed to be a commercial product in which a transparent heating wire made of indium tin oxide formed in a meandering manner on a resin film is sandwiched between other resin films, but the invention is limited to this. It is not something that will be done. Therefore, the heating wire 4a may be made of, for example, a nichrome wire, a carbon heating element, a silver paste, or the like.
The heating wire 4a extending in a meandering manner in the heating layer 4 is electrically connected at both ends to each of a pair of terminals 4b, as shown in FIG.
In this embodiment, the connection portions between each of the pair of terminals 4b and the heating wire 4a are set at both ends of the lower side of the transparent cover member 2 in the vehicle width direction, but the connection portions are not limited thereto. do not have.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.
As shown in FIG. 4, a terminal 4b to which a heating wire 4a is connected is electrically connected to a connector pin 4c via a conductive paste 4d.
Specifically, a hole H passing through the emblem 1 in the front-rear direction is formed at a position corresponding to the terminal 4b portion to which the heating wire 4a is connected.
A connector pin 4c is arranged at the rear of the hole H extending in the front-rear direction so that its tip protrudes toward the back side (rear side) of the emblem 1. Further, the front portion is filled with a conductive paste 4d so as to electrically connect the connector pin 4c and the terminal 4b.
Note that the connector pin 4c is electrically connected to a power source (not shown) controlled by an ECU (Electronic Control Unit).

Incidentally, the electric heating layer 4 (see FIG. 3) in this embodiment is provided on the surface of the transparent cover member 2 (see FIG. 3) as described above, but this will also be explained in the section of other embodiments to be described later. As shown in FIG. 3, the emblem 1 may be disposed along the surface direction between the front and back of the emblem 1 (see FIG. 3), provided that it is disposed on the front side (front side) of the heat insulating layer 9, which will be described later.

As shown in FIG. 3, a recess 12 into which the decorative member 3 is fitted is formed on the back side (rear side) of the transparent cover member 2. As shown in FIG.
The first decorative layer 6 is formed on the entire back side (rear side) of the transparent cover member 2 except for the recess 12. This first decorative layer 6 corresponds to a "colored layer" in the claims.

The first decorative layer 6 in this embodiment is assumed to be a colored resin coating. There are no particular limitations on the paint, and examples include urethane, acrylic, polyester, lacquer, and melamine paints.
The coating method is not particularly limited, and examples thereof include printing methods such as screen printing and gravure printing, and coating methods such as spraying after applying a predetermined masking method.
The thickness of the coating film is not particularly limited and can be set, for example, to about 5 to 50 μm.
However, the first decorative layer 6 is not limited to such a coating film, and may also be composed of a colored resin film laminated on the back side (rear side) of the transparent cover member 2.
The first decorative layer 6 sets the background color of the pattern appearing on the emblem 1, and also functions as a mask layer when selectively photocuring the adhesive layer 8 as described later.

The transparent cover member 2 in this embodiment is assumed to be made of resin made of polycarbonate. However, the material of the transparent cover member 2 is not particularly limited as long as it is so-called transparent (including translucent and colored transparent) that transmits radar waves and visible light.For example, acrylic resin, polystyrene, polychloride, etc. Thermoplastic resins such as vinyl can also be used.
Note that a hard coat layer 10 (see FIG. 5A etc.), which will be described later, can also be formed on the front side (front side) of such a transparent cover member 2. As this hard coat layer 10, a known one can be used depending on the material of the transparent cover member 2 to be used. For example, as a hard coat layer applied to the transparent cover member 2 made of polycarbonate, for example, a silicone hard coat can be used. A coating film (organopolysiloxane coating film) is mentioned.

(Decoration member)
As shown in FIG. 3, the decorative member 3 is configured by providing a second decorative layer 7 on the surface of the base member (inner base) 13 on the side facing the transparent cover member 2.
As shown in FIG. 1, the decoration member 3 forms a design such as a logotype and a frame surrounding the logotype within the opening frame 20a of the front grill 20 in the emblem 1 in plan view.
Incidentally, the decoration member 3 in this embodiment is a portion shown in outline within the opening frame 20a of the front grill 20 in a plan view shown in FIG. This decorative member 3 is framed or bordered by a first decorative layer 6 (shaded portion in FIG. 1), which will be described later.

The decoration member 3 is fitted into the recess 12 of the transparent cover member 2, as shown in FIG.
The decorative member 3 is formed of a base member 13 and a second decorative layer 7 formed on the surface of the base member 13.

The base member 13 serves as a base for the second decorative layer 7 applied to the surface of the decorative member 3. As the base member 13, for example, a molded article made of thermoplastic resin can be used, but a molded article made of acrylonitrile/ethylene/styrene resin, which has excellent weather resistance and impact resistance, is particularly preferable.

The second decorative layer 7 in this embodiment is assumed to be a metallic decorative layer through which radar waves (millimeter waves) can pass.
Specifically, the second decorative layer 7 is obtained by applying a metallic decorative film to the surface of the base member 13 using a three-dimensional surface decoration method (Three Dimension Overlay Method; TOM).
In this construction method, a metallic decorative film is three-dimensionally thermoformed along the surface of the base member 13 (the surface facing the recess 12 side) by vacuum forming using atmospheric pressure.
As the metallic decorative film, for example, a laminated composite film containing an indium vapor-deposited layer can be used. Incidentally, as the metallic decorative film, a commercially available product having an indium vapor-deposited layer of about 10 to 100 nm and a total thickness of about 25 to 100 μm can be used.
Such a decorative member 3 is fitted into the recess 12 via the adhesive layer 8.
The adhesive constituting the adhesive layer 8 in this embodiment is assumed to be transparent and become the heat insulating layer 9 after curing.

(insulation layer)
Next, the heat insulating layer 9 (see FIG. 3) will be explained.
This heat insulating layer 9 suppresses heat transfer to the back side (rear side) of the transparent cover member 2 (see FIG. 3), which is heated by the electric heating layer 4 (see FIG. 3) for snow melting and defrosting.
Such a heat insulating layer 9 is arranged on the back side (rear side) of the electric heating layer 4.
The adhesive layer 8 which also serves as the heat insulating layer 9 in this embodiment is preferably formed of a material having a lower thermal conductivity (W/m·K) than the transparent cover member 2 to be heated. Further, for example, assuming that the transparent cover member 2 is cooled from the back side of the emblem 1 during the severe winter of a cold region, the adhesive layer 8 has a thermal conductivity (W/m・It is preferable to use a material with a small K). Further, the adhesive layer 8 is preferably formed of a material having a lower thermal conductivity (W/m·K) than that of the back surface member 5 described later.
The adhesive forming such adhesive layer 8 is preferably a silicone adhesive, and more preferably a photothermocurable silicone adhesive (organopolysiloxane composition) as exemplified in the explanation of the manufacturing method below.
The thickness of the heat insulating layer 9 (adhesive layer 8) is not particularly limited, but can be set to, for example, about 100 μm to 2 mm.

(back member)
As shown in FIG. 3, the back member 5 is a backing member of the emblem 1.
The back member 5 is formed when the transparent cover member 2 and the like are placed in a predetermined mold and the emblem 1 is finally insert-molded using a resin material.

Such a back member 5 forms the outer shape of the back and side surfaces of the emblem 1.
In other words, the back surface member 5 comes into close contact with and covers the decorative member 3 and the adhesive layer 8 laminated on the first decorative layer 6 (colored layer). As described above, the back surface member 5 forms the outer peripheral side surface of the emblem 1 by covering the step 11 formed on the outer peripheral portion of the transparent cover member 2.

The material for the back member 5 is not particularly limited as long as it is permeable to radar waves (millimeter waves) and has moldability; for example, polycarbonate, acrylonitrile/butadiene/styrene resin, acrylonitrile/ethylene may be used.・Thermoplastic resins such as styrene resin, polypropylene, and polyurethane can be mentioned.

<Manufacturing method>
Next, a method for manufacturing the emblem 1 (decorative panel structure) shown in FIG. 3 will be described. 5A to 5D, FIG. 5F, and FIG. 5G are process explanatory diagrams of this manufacturing method. FIG. 5A is a process explanatory diagram of forming the electrothermal layer 4 on the transparent cover member 2. FIG. 5B is a process explanatory diagram of forming the first decorative layer 6 (colored layer) on the transparent cover member 2. FIG. 5C is a process explanatory diagram of forming the adhesive layer 8 on the transparent cover member 2. FIG. 5D is a process explanatory diagram of applying the second decorative layer 7 (metallic decorative layer) to the surface of the base member 13. FIG. 5E is a partially enlarged view schematically showing the surface of the indium vapor-deposited film 17 constituting the second decorative layer 7 (metallic decorative layer) in FIG. 5D. FIG. 5F is a partially enlarged view corresponding to the Vf section in FIG. 5D, and is a diagram showing the cut position of the metallic decorative film 16 forming the second decorative layer 7 (metallic decorative layer). FIG. 5G is an explanatory diagram of a process of fitting the decoration member 3 into the recess 12 of the transparent cover member 2.

In the manufacturing method of this embodiment, as shown in FIG. 5A, first, a transparent cover member 2 having a predetermined shape is prepared. This transparent cover member 2 can be obtained by a known resin molding method such as injection molding. Then, the electrothermal layer 4 is attached to the front side (front side) of the transparent cover member 2 via an adhesive or the like.
Further, on the surface side (front side) of the electrothermal layer 4, the hard coat layer 10 described above indicated by the imaginary line (two-dot chain line) can be formed using a silicone hard coat film or the like.

Next, in this manufacturing method, as shown in FIG. 5B, a first decorative layer 6 (colored layer) is formed in a range excluding the recesses 12. Specifically, a colored resin coating is formed on the back side (rear side) of the transparent cover member 2 as described above.

Next, in this manufacturing method, as shown in FIG. 5C, an adhesive layer 8 on the back side (rear side) of the transparent cover member 2 is formed. The adhesive layer 8 is formed by applying the adhesive to the entire back side (rear side) of the transparent cover member 2, including the inside of the recess 12 and the first decorative layer 6.
Incidentally, the adhesive used in this manufacturing method is assumed to be the silicone adhesive described above.

On the other hand, in this manufacturing method, the base member 13 shown in FIG. 5D is prepared.
As described above, this base member 13 is formed to correspond to the decorative member 3 (see FIG. 3).
Next, in this step, as shown in FIG. 5D, a second decorative layer 7 (metallic tone) shown in FIG. 3 is applied to the surface of the base member 13, that is, the surface facing the transparent cover member 2 (see FIG. A metallic decorative film 16 for forming a decorative layer is applied by a three-dimensional surface decoration method (Three Dimension Overlay Method; TOM).
As a result, the metallic decorative film 16 is brought into close contact with the surface 13a of the base member 13, thereby forming the second decorative layer 7 (metallic decorative layer), which is a three-dimensional surface decoration molded resin layer. Ru. Then, an excess metal-like decorative film 16 that does not participate in the formation of the second decorative layer 7 is left in the opening 13b of the base member 13 so as to close the opening 13b. This excess metal-like decorative film 16 is cut off in a later step.

As described above, this metal-like decorative film 16 may be, for example, a laminated composite film containing an indium vapor-deposited film (indium vapor-deposited layer).
As shown in FIG. 5E, such an indium vapor-deposited film 17 is formed such that indium particles 17a having a major axis of about 50 nm to 500 nm in plan view are spread out in a sea-island shape, for example.

The second decorative layer 7 (see FIG. 3) made of a laminated composite film including the indium vapor-deposited film 17 has metallic luster. The second decorative layer 7 (see FIG. 3) allows millimeter waves to pass through sea areas 17b formed between indium particles 17a in the indium vapor-deposited film 17.
Then, as shown in FIG. 5F, the excess metal-like decorative film 16 is cut off at the outer end of the decorative member 3, that is, at the portion indicated by the arrow Ct in FIG. 5F, so that the decorative member 3 shown in FIG. is obtained.

Next, in this manufacturing method, as shown in FIG. It is adhered by an adhesive forming layer 9).
As described above, the adhesive in this embodiment is assumed to be a silicone adhesive. Although this silicone adhesive is assumed to be an organopolysiloxane composition containing an addition-curing catalyst, a condensation-type organopolysiloxane composition can also be used as the silicone adhesive.

Further, as the silicone adhesive, an organopolysiloxane composition containing a photothermal curing type catalyst can also be used.
Incidentally, examples of the photothermally curable silicone adhesive include those containing an alkenyl group-containing organopolysiloxane, an organohydrogenpolysiloxane, and a photothermally activated catalyst.

Note that, unlike the above-mentioned addition-curing and condensation-curing silicone adhesives, which harden over time, this photo-thermal curing silicone adhesive cures inside the recess 12 by ultraviolet light irradiated from the transparent cover member 2 side. The silicone adhesive placed is first cured. Thereby, the decorative member 3 is joined to the transparent cover member 2. At this time, the first decorative layer 6 (colored layer) of the transparent cover member 2 that sets the background color is made of silicone adhesive 8a (see FIG. 5G) applied over this first decorative layer 6. Functions as a mask layer. In other words, the silicone adhesive 8a applied over the first decorative layer 6 remains in an uncured state because the ultraviolet light irradiated from the transparent cover member 2 side is blocked by the first decorative layer 6. maintain. This uncured silicone adhesive 8a will be heated and cured during insert molding in a mold, which will be described next.

Next, in this manufacturing method, although not shown, a transparent cover member 2 into which a decorative member 3 shown in FIG. 5G is fitted is placed in a predetermined mold, and a predetermined of molten resin material is injected. As a result, the outer shape of the emblem 1 (see FIG. 3), in which the transparent cover member 2 having the decorative member 3 as an insert member is lined with the back member 5 (see FIG. 3), is formed in the mold. Note that the uncured photothermocurable silicone adhesive 8a (see FIG. 5G) applied over the first decorative layer 6 is heated and cured within this mold.
Then, a connector pin 4c (see FIG. 4) that is electrically connected to a terminal 4b (see FIG. 4) is attached using a conductive paste 4d (see FIG. 4) to complete the emblem 1 of this embodiment (see FIG. 2). do.

≪Effect≫
Next, the effects of the emblem 1 (decorative panel structure) of this embodiment and its manufacturing method will be described.

In the emblem 1 of this embodiment, the heat insulating layer 9 is arranged closer to the back side of the emblem 1 than the electric heating layer 4 is.
According to such an emblem 1, the heat insulating layer 9 effectively suppresses the heat generated in the electric heating layer 4 from escaping from the back side of the emblem 1. Thereby, in the emblem 1, there is no need to increase the wiring density of the heating wires 4a to increase the amount of heat generated in the heating layer 4. That is, this emblem 1 can efficiently melt snow, defrost, etc. without degrading the transmission performance of radar waves (millimeter waves) by the heating wire 4a.

Furthermore, in the emblem 1 of this embodiment, a heat insulating layer 9 (adhesive layer 8) is formed on the back surface of the transparent cover member 2.
According to such an emblem 1, the heat generated in the electric heating layer 4 can be more effectively retained in the transparent cover member 2 by the heat insulating layer 9.

Furthermore, in the emblem 1 of this embodiment, the adhesive layer 8 also serves as a heat insulating layer 9.
According to such an emblem 1, the structure is simplified compared to one in which a heat insulating layer 9 is provided separately from the adhesive layer 8. Thereby, the emblem 1 can be made thinner, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

Further, in the emblem 1 of this embodiment, the adhesive layer 8 is formed over the entire back side of the transparent cover member 2.
According to such an emblem 1, the heat generated in the electric heating layer 4 can be more effectively retained in the transparent cover member 2 due to the heat insulating performance that the adhesive layer 8 has.

Furthermore, in the emblem 1 of this embodiment, the adhesive forming the adhesive layer 8 is a photothermal curing type silicone adhesive.
In this emblem 1, the adhesive interposed between the transparent cover member 2 and the decorative member 3 is photocured by ultraviolet light irradiated from the transparent cover member 2 side, and The adhesive applied over the decorative layer 6 (colored layer) is thermally cured during insert molding within the mold.
According to such an emblem 1, the bonding strength of the back member 5 to the transparent cover member 2 (first decorative layer 6) via the adhesive layer 8 is improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present invention.
In the emblem 1 of the embodiment, the electrothermal layer 4 is formed on the surface of the transparent cover member 2, but if the electrothermal layer 4 is formed on the front side (front side) of the heat insulating layer 9, there are particular restrictions on its formation position. There isn't. Therefore, the electrothermal layer 4 can also be formed on the back surface (rear surface) of the transparent cover member 2. Further, the electrode layer 4 can also be insert-molded within the transparent cover member 2.

Further, the approximately rectangular emblem 1 of the embodiment is assumed to be placed behind the front grill 20, but the emblem 1 only has an oval portion facing into the opening frame 20a of the front grill 20, It can also be configured to be attached to the front part of the front grill 20.

Furthermore, in the embodiment described above, the emblem 1 is arranged at the front of the vehicle body, but the object to which the decorative panel structure of the present invention is attached is not limited to the vehicle body. Therefore, the decorative panel structure can also be attached to other moving objects such as ships and aircraft. Further, the decorative panel structure can be placed on any of the front, back, left, right, top and bottom of the object.

1 Emblem 2 Transparent cover member 3 Decorating member 4 Heating layer 4a Heating wire 4b Terminal 5 Back member 6 First decorative layer (colored layer)
7 Second decorative layer (metallic decorative layer)
8 Adhesive layer 9 Heat insulating layer 12 Recess of transparent cover member 13 Base member of decorative member 16 Metallic decorative film 17 Indium vapor deposited film 17a Indium particles 18 Cutting portion of metallic decorative film 22 Radar device

Claims (2)

A decorative panel structure comprising an electric heating layer,
a panel-shaped transparent cover member disposed on the front side of the decorative panel structure;
a decoration member that can transmit radar waves and is joined to the back surface of the transparent cover member;
Equipped with
The electric heating layer is arranged along the surface direction between the front and back of the decorative panel structure,
further comprising a heat insulating layer that insulates heat from the electric heating layer closer to the back side of the decorative panel structure than the electric heating layer,
The decorative member is fitted and bonded to a recess formed on the back surface of the transparent cover member via an adhesive,
The adhesive layer made of the adhesive also serves as the heat insulating layer,
The adhesive layer is formed over the entire back side of the transparent cover member,
further comprising a colored layer formed on the back surface of the transparent cover member excluding the recessed part,
The decorative panel characterized in that the adhesive applied to the recessed portion and the adhesive applied to the back side of the transparent cover member via the colored layer are photothermosetting silicone adhesives. structure. The decorative panel structure according to claim 1, wherein the heat insulating layer is formed on the back surface of the transparent cover member.

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