JP2006137227A - Feeding structure for vehicular laminated glass, and sunroof panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new feeding structure feeding to a conductive film sealed in a vehicular laminated glass from an opening portion provided on one surface of the laminated glass, without causing breaking of the glass and entering of moisture. <P>SOLUTION: In the feeding structure for the laminated glass feeding from the opening portion provided on one surface of the laminated glass, the opening portion of the laminated glass is sealed by a water repellent soft member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power feeding structure for laminated glass for vehicles in which a conductive film is enclosed, and particularly to a feeding structure for laminated glass for vehicles in which an EL (Electro Luminescence) sheet is enclosed.

  In recent years, conductive films such as EL sheets and electrochromism sheets that can be easily reduced in thickness and weight, consume less power, and have abundant emission colors, and various lighting, display panels, displays, etc. Is used. FIG. 3 shows a schematic diagram of an EL sheet as an example of the conductive film. As shown in FIG. 3, the EL sheet 50 is formed by laminating an insulating transparent substrate 51, a transparent electrode layer 52, a light emitting layer 53, an insulating layer 54, and a back electrode layer 55 in this order. When an AC voltage is applied to the EL sheet 50 from the AC power source 56, electrons and holes are separated and recombined in the light emitting layer 53 to emit light. The EL sheet 50 having the configuration as shown in FIG. 3 emits light from the transparent substrate 51 side (lower side in the figure).

  Such an EL sheet 50 can be used as a panel capable of emitting light by being enclosed in transparent glass or the like. FIG. 4 schematically shows a cross section of a panel 60 which is an example of the panel capable of emitting light. The panel 60 has a structure in which an EL sheet 50 (the layer configuration is omitted) is sandwiched between laminated glasses 62a and 62b via transparent intermediate films 61a and 61b.

  This panel 60 can be used for a sunroof panel 72 attached to an opening 71 provided in a fixed roof 70 of a vehicle as shown in FIG. 5, for example. In this case, not only the effect of reducing the power consumption by the EL sheet 50 described above, but also the design effect of interior lighting can be enhanced by using abundant luminescent colors as room lights in the vehicle interior.

As a power feeding structure to a laminated glass for a vehicle in which such a conductive film is enclosed, there is a structure disclosed in Patent Document 1.
Patent Document 1 includes an outdoor first glass sheet, a layer having an organic polymer that filters ultraviolet rays, an intermediate second glass sheet, and an indoor third glass sheet, and an external space between them. Disclosed is a laminated structure of single or multiple electrochromic laminated glasses for outdoor use, in which an electrochromic layer comprising a conductive layer with two conductive tracks connected to a current lead is disposed. Yes.
FIG. 1 of Patent Document 1 has a structure in which an electrochromic layer between laminated glasses is connected to an external electrode via a screen-printed conductive track, and power is supplied from the end face of the laminated glass. It is shown.
JP-A-8-304854 (Claim 23, paragraphs 0035 to 0039, FIG. 1)

However, in the power feeding structure shown in Patent Document 1, the power feeding position is necessarily limited to the peripheral edge of the laminated glass. If power can be supplied by providing an opening in the glass, it is not necessary to limit the power supply position to the peripheral portion, and the degree of freedom in design is improved. Generally, a laminated glass of a vehicle is attached to a support frame or the like by surrounding it with a rubber seal member such as a weather strip. At this time, it is not easy to secure a space for laying the power cable in a rubber seal member, a support frame or the like, so it is important to improve the degree of freedom in design.
Although the power feeding structure provided with an opening in glass has the above-mentioned advantages, it has not been realized because the following two problems have not been solved.
First, since the laminated glass for vehicles is used under conditions with a large temperature difference, it is necessary to prevent the occurrence of cracks starting from the opening based on the difference in thermal expansion coefficient between the sealing member of the opening and the glass.
On the other hand, laminated glass for vehicles is used under conditions that are exposed to wind and rain. On the other hand, conductive films such as EL sheets are likely to deteriorate in performance due to moisture, so that it is necessary to prevent moisture from entering.

  The present invention has been made in view of such problems, and provides a novel power feeding structure that feeds power to an electrically conductive film sealed in a laminated glass for a vehicle from an opening provided on one surface of the laminated glass. For the purpose. It is another object of the present invention to provide a power feeding structure for feeding power to a conductive film sealed in a laminated glass for a vehicle without causing glass breakage and moisture intrusion from an opening provided on one surface of the laminated glass. .

  The power feeding structure described in claim 1 of the present invention that has solved the above problem is characterized in that a wiring connected to the conductive film from an opening provided on one surface of a laminated glass for a vehicle in which the conductive film is enclosed. It is characterized by extending.

  The power supply structure according to claim 1 provides a new power supply structure that supplies power from an opening provided on one surface of the laminated glass. Thereby, the freedom degree of design in the case of installing in a vehicle laminated glass for vehicles in which conductive films, such as an EL sheet, a heater, and an electrochromic sheet, were enclosed improves.

  According to a second aspect of the present invention, there is provided a feeding structure of a laminated glass in which power is fed from an opening provided on one surface of a laminated glass, wherein the opening of the laminated glass is sealed with a water-repellent soft member. To do.

In the power supply structure according to claim 2, since the opening of the laminated glass is sealed with a water-repellent soft member, the soft member adheres to the glass and prevents water from entering due to water repellency. Can be prevented from entering.
In addition, by sealing the opening of the laminated glass with a soft member, the soft member absorbs the dimensional difference caused by the difference in thermal expansion coefficient between the sealing member of the opening and the glass, so Occurrence can be prevented.

  The power feeding structure described in claim 3 is a laminated glass feeding structure in which power is fed from an opening provided on one side of the laminated glass. The wiring to the conductive film has one end connected to the conductive film and the other end opened. It is characterized by comprising a bus bar exposed to the part and a conductive wire having one end connected to the bus bar exposed to the opening.

  According to the power supply structure of claim 3, since the conductive wire is connected to the conductive film through the bus bar, the conductive wire is connected to a position away from the conductive film by adjusting the length of the bus bar. Since the opening can be provided, even when moisture enters from the opening, a structure in which the influence of moisture is not exerted on the conductive film can be obtained.

  The power supply structure described in claim 4 is characterized in that the conductive film sealed in the laminated glass is an EL sheet.

  According to the power feeding structure of the fourth aspect, since the EL sheet is sealed in the laminated glass, it is possible to prevent the performance from being deteriorated due to the ingress of moisture even with an EL sheet that is particularly vulnerable to moisture.

  The power feeding structure described in claim 5 is characterized in that the opening is provided on the inner surface of the laminated glass for a vehicle and in a portion covered with a mounting frame for the laminated glass for a vehicle.

  According to the power feeding structure described in claim 5, by providing the opening in the portion covered with the mounting frame of the laminated glass for vehicles, it is possible to effectively prevent moisture from entering the opening, and to provide a power feeding coupler or the like. It is possible to improve the appearance by hiding these members with the mounting frame of the laminated glass for vehicles.

  The power feeding structure described in claim 6 is characterized in that an adhesive for adhering the laminated glass for a vehicle to a mounting frame of the laminated glass for a vehicle is laid so as to surround the opening.

  According to the power feeding structure of the sixth aspect, since the adhesive is laid so as to surround the opening, it is possible to more effectively prevent moisture from entering the opening by the adhesive.

  A seventh aspect of the present invention is a sunroof panel comprising the power feeding structure according to any one of the first to sixth aspects.

  According to the sunroof panel of claim 7, the sunroof panel in which the degree of freedom in designing the sunroof panel encapsulating the electroconductive film such as an EL sheet is improved and the performance degradation of the electroconductive film due to moisture is prevented. Can be provided.

  According to such a power feeding structure, it is possible to provide a novel power feeding structure that feeds power from an opening provided on one surface of the laminated glass. In addition, it is possible to prevent moisture from entering from the opening, and it is possible to prevent generation of cracks starting from the opening.

  Next, an embodiment of a power feeding structure according to the present invention will be described with reference to the drawings as appropriate, taking as an example the case where a laminated glass for a vehicle encapsulating an EL sheet as a conductive film is used for a sunroof panel.

FIG. 1 is a main part perspective view showing an example of an EL sheet according to the present embodiment, and is a diagram schematically showing a wiring connection structure. FIG. 2 is a view showing a structure of a sunroof panel according to an embodiment of the present invention.
In FIG. 1, the wiring is connected to the EL sheet 1 with terminals 8 and 9 and the other end is connected to the electrodes 11 and 12 to be exposed to the opening 13 and the two bus bars 7 and 10. The conductive line 14 is connected to the bus bar at the electrodes 11 and 12.

  As shown in FIG. 1, the EL sheet 1 has a transparent electrode layer 3, a light emitting layer 4, an insulating layer 5, and a back electrode layer 6 that are sequentially laminated on a transparent substrate 2.

  The material of the transparent substrate 2 is not particularly limited as long as it has insulating properties, but a material excellent in workability, such as polyethylene terephthalate (PET), can be preferably used. Although it will not specifically limit if it has electroconductivity also about the transparent electrode layer 3, Indium tin oxide (ITO) etc. which have favorable light transmittance and electroconductivity can be used conveniently.

The light-emitting body forming the light-emitting layer 4 is not particularly limited as long as it is an electroluminescent body, but zinc sulfide (ZnS) or the like having a high light emission intensity can be suitably used. Further, an insulator for forming the insulating layer 5 has only to have a high dielectric, for example, can be preferably used barium titanate (BaTiO ₃₎ or the like.

  About the back electrode layer 6, if it is a material with a small work function with respect to the transparent electrode layer 3, it will not specifically limit. For example, when ITO is used for the transparent electrode layer 3, carbon or the like can be suitably used.

  As for the thickness of each layer, the thickness of the transparent substrate 2 is 75 to 125 μm, the thickness of the transparent electrode layer 3 is 3 to 5 μm, the thickness of the light emitting layer 4 is 20 to 40 μm, the thickness of the insulating layer 5 is 10 to 30 μm, and the back electrode layer 6 The thickness is preferably 10 to 30 μm.

  Next, an example of a method for manufacturing the EL sheet 1 will be described. First, the transparent electrode layer 3 is provided on the transparent substrate 2 such as PET. When ITO is used as the transparent electrode layer 3, an ink for forming an ITO layer in which ITO powder is dispersed and dissolved in a solvent is applied onto the transparent substrate 2 and heated and dried. Next, the light emitting layer 4 is provided by screen printing. At this time, it is necessary to prepare a screen plate so that the light emitting layer 4 is not printed on the terminal 8 to which the bus bar 7 is connected. Subsequently, the insulating layer 5 and the back electrode layer 6 are provided on the light emitting layer 4 in this order by screen printing. Also at this time, it is necessary to produce a screen plate so that the terminal 9 of the back electrode layer 6 is not short-circuited to the light emitting layer 4.

  Subsequently, one end of the bus bar 7 and the bus bar 10 is connected to the terminal 8 and the terminal 9 respectively provided on the transparent electrode layer 3 and the back electrode layer 6. The connection method is not particularly limited as long as it is an electrical connection method. For example, the connection may be made with a conductive paste or the like. At this time, an insulating layer may be provided as appropriate so that the bus bars 7 and 10 are not printed on the light emitting layer 4 or the like and a short circuit occurs.

The other ends of the bus bars 7 and 10 are provided with electrodes 11 and 12 for connecting a conductive wire 14 connected to an external power source. The electrodes 11 and 12 may be formed of a conductive paste or the like, or may be provided by depositing a copper thin film on the transparent substrate 2, plating, or bonding a copper foil.
And it connects to the external power supply (not shown) by the conductive wire 14 from the opening part 13 provided in the one surface of the laminated glass (not shown) so that the electrodes 11 and 12 may be exposed. As the power source, an AC power source or an AC power source obtained by converting a DC power source with an inverter can be used.

  Next, the sunroof panel 20 in which the EL sheet 1 used in the present invention is enclosed will be described with reference to FIG. FIG. 2 is a cross-sectional view showing a power feeding structure for feeding power to the EL sheet 1 (the layer configuration is omitted) enclosed in the sunroof panel 20 from the opening 13 provided in the sunroof panel 20. It is sectional drawing seen from A arrow direction.

As shown in FIG. 2, the sunroof panel 20 has a structure in which the EL sheet 1 is sandwiched between transparent laminated glasses 22a and 22b via transparent intermediate films 21a and 21b. The opening 13 is provided on the inner side (lower side in the figure) of the sunroof panel 20 and at a position where the electrodes 11 and 12 are exposed.
The EL sheet 1 is sealed with the transparent substrate 2 (see FIG. 1) facing the vehicle interior. Thereby, light emission by the EL sheet 1 can be used for room lights and the like.

  For the intermediate films 21a and 21b, plastic films such as polyvinyl butyral (PVB) and ethylene-vinyl acetate copolymer (EVA), which have good adhesiveness to glass, can be suitably used. Moreover, although laminated glass 22a, 22b is not specifically limited, What was equipped with the ultraviolet-ray cut function for the durable improvement of EL sheet 1 is preferable.

  Next, an example of a method for encapsulating the EL sheet 1 in the laminated glasses 22a and 22b will be described. First, the EL sheet 1 is sandwiched between the intermediate films 21a and 21b, and further sandwiched between the laminated glasses 22a and 22b, and then heated and pressurized using an autoclave, so that the EL sheet 1 is enclosed in the laminated glasses 22a and 22b. Is done. At this time, the bus bars 7 and 10 and the electrodes 11 and 12 (see FIG. 1) connected to the EL sheet 1 are heated and pressurized in a state of being enclosed in the intermediate films 21a and 21b.

  At this time, a through-hole is previously formed in one side of the laminated glass (laminated glass 22b in the present embodiment), and the positions of the through-hole and the electrodes 11 and 12 of the EL sheet 1 are aligned, and the autoclave is formed by the method described above. The opening 13 can be formed by heating and pressurizing using. The through hole of the laminated glass 22b can be formed by a known method such as machining or laser processing. Since there are fine cracks or the like around the through hole of the laminated glass 22b after processing, which causes a crack starting from the opening 13, it is preferable to smooth the glass surface by etching using hydrofluoric acid.

  The intermediate films 21a and 21b covering the electrodes 11 and 12 can be removed by laser processing, for example. In this case, it is possible to use a method in which the electrodes 11 and 12 are formed of copper foil and the copper foil is exposed by reflection of laser light. Alternatively, the intermediate films 21a and 21b on the electrodes 11 and 12 may be removed in advance.

  The opening 13 may have a structure in which one common hole for exposing the electrodes 11 and 12 is exposed as shown in FIG. 2 or a structure in which individual holes are provided for the electrodes 11 and 12. When a common hole is provided, the glass drilling process can be simplified. In the case where the individual holes are provided, the area of the opening of the laminated glass can be reduced as compared with the case where the common holes are provided, and moisture can be prevented more effectively.

  Power supply to the electrodes 11 and 12 is performed using a conductive line 14 including a power supply coupler 24 from a power source (not shown). The opening 13 into which the conductive wire 14 is inserted is sealed with a water-repellent soft member. The water-repellent soft member may be soft rubber or resin having high hydrophobicity, and for example, silicone rubber, Teflon (registered trademark), and fluoro rubber can be suitably used. Alternatively, the opening 13 may be sealed by curing the organopolysiloxane compound by photopolymerization. In addition, silicone grease, caulking agent, etc. can be used in combination.

By sealing the opening 13 of the laminated glass 22b with a water-repellent soft member, the soft member adheres to the glass by elasticity and prevents water from entering due to water repellency, thus preventing water from entering from the opening 13. be able to.
Further, by sealing the opening 13 of the laminated glass 22b with a soft member, the soft member elastically deforms and absorbs the dimensional difference caused by the difference in thermal expansion coefficient between the sealing member of the opening and the glass. Generation of cracks starting from 13 can be prevented.

  For example, the conductive wire 14 including the power supply coupler 24 protrudes from the laminated glass 22b by a metal pin 15 erected on the electrodes 11 and 12 by soldering or the like, and the power supply coupler 24 is fitted to the pin 15 to be externally provided. The power supply cable 16 can be connected to the power source. It is preferable that the surface where the power feeding coupler 24 is in contact with the laminated glass 22b is sealed with a caulking agent, a sealing agent, an adhesive, or the like so that moisture does not enter.

  Moreover, it is preferable to provide the opening part 13 in the part covered with the panel holder 28 which is a frame for attachment of the sunroof panel 20. By providing the opening 13 at such a position, it is possible to effectively prevent moisture from entering the opening 13 and to improve the appearance by hiding the power supply coupler 24 with the panel holder 28. The EL sheet 1 can be supplied with power by connecting the power supply coupler 24 to the power source on the vehicle body side through the back of the panel holder 28.

Next, the seal structure of the end surface 20a of the sunroof panel 20 will be described.
The end surface 20 a of the sunroof panel 20 is sealed with a weather strip 27. The weather strip 27 includes a curved portion 27a provided on the outer peripheral side (left side in the drawing), a horizontal portion 27b provided below the inner peripheral side, and a lip portion 27c provided above the inner peripheral side. And a groove portion 27d provided between the curved portion 27a and the horizontal portion 27b. A panel holder 28 that supports the sunroof panel 20 is fitted into the groove 27d. The panel holder 28 supports the sunroof panel 20 via an adhesive 29.

  The adhesive 29 can be laid between the opening 13 and the weather strip 27. Alternatively, the adhesive 29 can be laid so as to surround the opening 13 as shown in FIG. By laying the adhesive 29 in this way, it is possible to more effectively prevent moisture from entering the opening 13.

  As shown in FIG. 2, the curved portion 27a of the weather strip 27 is elastically deformed and brought into contact with the opening side wall 30a of the fixed roof 30, and the lip portion 27c is fitted so as to wrap around the end surface 20a of the sunroof panel 20. ing. This prevents dust and moisture from entering the vehicle and the end surface 20a of the sunroof panel 20.

As described above, when the structure in which power is supplied from the opening 13 provided on one surface of the laminated glass 22b for a vehicle is compared with the structure in which power is supplied from the end face 20a of the laminated glass, the power supply position can be freely selected, so that the degree of freedom in design is improved. There is an advantage.
In the case of a structure in which power is supplied from the end face 20a of the laminated glass, if the power supply coupler 24 is provided inside the weather strip 27, it is necessary to provide a structure that prevents moisture from entering at the portion where the power supply cable 16 is taken out from the weather strip 27. The structure of the weather strip becomes complicated. On the other hand, this structure can be avoided in the structure in which power is supplied from the opening 13 provided on one surface of the laminated glass 22b, and a weather strip having a complicated structure is not required.

  Alternatively, in a structure in which power is fed from the end face 20a of the laminated glass, when the power feeding coupler 24 is provided outside the weather strip 27, a process of providing wiring from the end face 20a of the laminated glass to the power feeding coupler 24 by screen printing or the like is required. Such a process is not necessary in the structure in which power is supplied from the opening 13 provided on one surface of the laminated glass 22b.

As mentioned above, although preferable embodiment was described, this invention is not limited to the said embodiment.
For example, in the case of a conductive film whose performance is not degraded by moisture, an electrode may be formed directly on the electrode layer without using a bus bar.

Alternatively, the opening 13 has been described as being formed by providing a through hole in the laminated glass 22b in advance. However, the laminated glass 22a, 22b is heated and pressurized by an autoclave, and then drilled in one side of the laminated glass by laser processing. It may be formed. At this time, it is possible to use a method in which the electrodes 11 and 12 are formed of copper foil and the copper foil is exposed by reflection of laser light.
Moreover, it is good also as a structure which provides the pin 15 in the coupler side and press-contacts an electrode instead of standing the pin 15 in the electrodes 11 and 12. FIG.

It is a schematic diagram showing the electric power feeding structure to the EL sheet which concerns on embodiment. It is sectional drawing of the panel with which the EL sheet which concerns on embodiment was enclosed. It is sectional drawing of an EL sheet. It is sectional drawing of the panel with which the EL sheet was enclosed. It is a whole perspective view of a sunroof panel.

Explanation of symbols

1 EL sheet (conductive film)
7 Bus Bar 10 Bus Bar 11 Electrode 12 Electrode 13 Opening 14 Conductive Wire 15 Pin 16 Feed Cable 20 Sunroof Panel 22a Laminated Glass 22b Laminated Glass 24 Feed Coupler 28 Panel Holder (Frame for Mounting Laminated Glass for Vehicle)

Claims (7)

  A power feeding structure for a laminated glass for a vehicle, wherein a wiring connected to the conductive film is extended from an opening provided on one surface of the laminated glass for a vehicle in which the conductive film is sealed.   The power feeding structure for laminated glass for vehicles according to claim 1, wherein the opening is sealed with a water-repellent soft member. The wiring is
A bus bar having one end connected to the conductive film and the other end exposed to the opening;
3. The power feeding structure for a laminated glass for a vehicle according to claim 1, wherein one end is composed of a conductive wire connected to the bus bar exposed at the opening. 4.   The power feeding structure for laminated glass for vehicles according to any one of claims 1 to 3, wherein the conductive film is an EL sheet.   5. The opening according to claim 1, wherein the opening is provided on an inner surface of the laminated glass for a vehicle and a portion covered with a mounting frame for the laminated glass for a vehicle. The power supply structure for laminated glass for vehicles as described in the paragraph.   6. The adhesive according to claim 1, wherein an adhesive for bonding the vehicle laminated glass to a mounting frame of the vehicle laminated glass is laid so as to surround the opening. The power supply structure for laminated glass for vehicles as described in the paragraph.   The sunroof panel provided with the electric power feeding structure of any one of Claims 1-6.

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