Vehicular window glass

Abstract

To provide vehicular window glass which has an anti-fogging function and in which an increase in the area of a region occupied by electrically conductive wires can be suppressed.SOLUTION: Vehicular window glass 1 according to one embodiment of the present disclosure comprises: a first region 10 which is provided at a predetermined position of the vehicular window glass 1, and enables acquisition of predetermined information from the outside of the vehicle using an information acquisition device; and an electrically conductive wire 20 which can heat the first region 10. The electrically conductive wire 20 includes: a first heat generating portion 11 which is provided on a main surface on the vehicle interior, of the vehicular window glass 1, and heats the first region 10; and a second heat generating portion 12 which is provided in a second region 15 different from the first region 10 on the main surface on the vehicle interior side, of the vehicular window glass 1, and can adjust the overall resistance value of the electrically conductive wire 20. A heat sink 30 is adhered to the surface on the opposite side to the vehicular window glass 1, of the second heat generating portion 12 using an adhesive 31.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to vehicle glazings. [Background technology]

[0002] In recent years, advanced driver assistance systems (ADAS) in which information acquisition devices such as cameras are attached to automobiles have been developed. The information acquisition devices used in the advanced driver assistance systems are attached to the windshield via a resin bracket. Patent Document 1 discloses a windshield equipped with an information acquisition device such as a camera that acquires information outside the vehicle.

[0003] According to the windshield disclosed in Patent Document 1, an information acquisition area that faces the camera and through which light passes is positioned adjacent to a shielding layer or is surrounded by the shielding layer, and this information acquisition area is heated by an information acquisition area heating section to remove fogging from the information acquisition area. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-216193 A Summary of the Invention [Problem to be solved by the invention]

[0005] A vehicle window glass having an anti-fogging function has, for example, a conductive wire (heating wire) provided on the main surface of the vehicle window glass on the inside of the vehicle, and the vehicle window glass is heated by passing an electric current through the conductive wire to remove fogging from the information acquisition area. Such a conductive wire is connected to the vehicle battery via wiring, and a constant voltage (for example, 11 to 14 V) is applied from the battery.

[0006] At this time, it is necessary to adjust the current flowing through the conductive wire. For example, the current flowing through the conductive wire can be adjusted by adjusting the length of the conductive wire arranged outside the heat generating portion and changing the resistance value of the conductive wire itself. However, when the length of the conductive wire arranged outside the heat generating portion is increased, a separate area must be provided for the conductive wire, which causes a problem that the area of ​​the region occupied by the conductive wire in the vehicle window glass becomes large.

[0007] In view of the above problems, an object of the present disclosure is to provide a vehicle window glass having an anti-fogging function that can suppress an increase in the area occupied by a conductive wire. [Means for solving the problem]

[0008] A vehicle window glass according to one embodiment of the present disclosure includes: A first area is provided at a predetermined position on a vehicle window glass, and is capable of acquiring predetermined information from outside the vehicle using an information acquisition device; a conductive wire capable of heating the first region; The conductive wire is A first heating portion is provided on a main surface of the vehicle window glass on an interior side thereof and heats the first region; a second heating portion provided in a second region different from the first region on a main surface of the vehicle interior side of the vehicle window glass, the second heating portion being capable of adjusting an overall resistance value of the conductive wire; A heat sink is attached to the surface of the second heat generating portion opposite to the vehicle window glass using an adhesive. Effect of the Invention

[0009] According to the present disclosure, it is possible to prevent the area of ​​the region occupied by the conductive wires in a vehicle window glass having an anti-fogging function from becoming large. [Brief description of the drawings]

[0010] [Figure 1] 1 is a front view showing a configuration example of a vehicle window glass according to an embodiment; [Diagram 2]1 is an enlarged front view showing a configuration example of a vehicle window glass according to an embodiment; [Diagram 3] 3 is a cross-sectional view of a vehicle window glass according to an embodiment in the vicinity of a second heat generating portion. FIG. [Figure 4] 3A to 3C are diagrams illustrating an example of a configuration of a conductive wire included in a vehicle window glass according to an embodiment. [Diagram 5] 13A and 13B are diagrams illustrating other configuration examples of the heating wire of the second heat generating portion. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] 13A and 13B are diagrams illustrating other configuration examples of the heating wire of the second heat generating portion. [Figure 8] FIG. 4 is an enlarged front view showing another configuration example of a vehicle window glass according to an embodiment. [Figure 9] 7A to 7C are diagrams illustrating other configuration examples of the conductive wire included in the vehicle window glass according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment will be described with reference to the drawings. Fig. 1 is a front view showing a configuration example of a vehicle window glass according to an embodiment. Fig. 2 is an enlarged front view showing the configuration example of a vehicle window glass according to an embodiment. Fig. 2 is an enlarged front view of an upper central portion (area A) shown in Fig. 1. Figs. 1 and 2 are front views seen from the vehicle interior side.

[0012] As shown in FIG. 1, a vehicle window glass 1 according to this embodiment is typically a windshield for an automobile. The vehicle window glass 1 may be a single glass plate, or may be laminated glass in which two or more glass plates are laminated. When the vehicle window glass 1 is a windshield, the vehicle window glass 1 is preferably laminated glass. When the vehicle window glass 1 is laminated glass, the vehicle window glass 1 is formed by bonding, via an interlayer film, an interior glass plate located on the interior side of the vehicle and an exterior glass plate located on the exterior side of the vehicle when the vehicle window glass 1 is installed in the vehicle.

[0013] The vehicle window glass 1 may be inorganic glass or organic glass. As the inorganic glass, for example, soda lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc., can be used without any particular limitation. Among these, soda lime glass is particularly preferable from the viewpoint of manufacturing cost and formability. The forming method of the vehicle window glass is not particularly limited. For example, in the case of inorganic glass, the vehicle window glass 1 is preferably a glass plate formed by a float method or the like.

[0014] When the vehicle window glass 1 is inorganic glass, the vehicle window glass 1 may be either untempered glass or tempered glass. Untempered glass is obtained by forming molten glass into a plate shape and slowly cooling it. Tempered glass is obtained by forming a compressive stress layer on the surface of untempered glass, and may be either air-cooled tempered glass or chemically tempered glass. When the vehicle window glass 1 is laminated glass, the vehicle interior glass plate and the vehicle exterior glass plate may be untempered glass. When the vehicle window glass 1 is a single glass plate, it may be tempered glass.

[0015] The vehicle window glass 1 may have a curved shape such that the vehicle exterior side is convex when installed in a vehicle. When the vehicle window glass 1 is a laminated glass, both the vehicle interior glass sheet and the vehicle exterior glass sheet may have a curved shape such that the vehicle exterior side is convex. As described above, the vehicle window glass 1 has a radius of curvature in the left-right direction of 2500 mm to 11000 mm and a radius of curvature in the up-down direction of 2000 mm to 7000 mm. Gravity forming, press forming, roller forming, or the like is used for bending the vehicle window glass 1.

[0016] When the vehicle window glass 1 is a laminated glass, the thickness of the glass plate on the inside of the vehicle and the thickness of the glass plate on the outside of the vehicle may be the same or different. The thickness of the glass plate on the inside of the vehicle is preferably 0.3 mm or more and 2.3 mm or less. When the thickness of the glass plate on the inside of the vehicle is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass is not too large. The thickness of the glass plate on the outside of the vehicle is preferably 1.0 mm or more and 3.5 mm or less. When the thickness of the glass plate on the outside of the vehicle is 1.0 mm or more, the strength of the performance of resistance to flying stones and the like is sufficient, and when it is 3.5 mm or less, the mass of the laminated glass is not too large, which is preferable in terms of fuel efficiency of the vehicle. When the thickness of the glass plate on the outside of the vehicle and the thickness of the glass plate on the inside of the vehicle are each 1.8 mm or less, it is preferable that the laminated glass can be made both lightweight and soundproof. When the thickness of the glass plate on the inside of the vehicle is 1.0 mm or less, the glass plate on the inside of the vehicle may be chemically strengthened glass. When the glass sheet facing the vehicle interior is a chemically strengthened glass, it is preferable that the compressive stress value of the glass surface is 300 MPa or more and the depth of the compressive stress layer is 2 μm or more.

[0017] When the vehicle window glass 1 is a laminated glass, the interlayer film is, for example, a known thermoplastic resin film made of polyvinyl butyral (PVB) or ethylene vinyl acetate copolymer (EVA). The interlayer film may be transparent or colored. The interlayer film may be composed of two or more layers of films.

[0018] The vehicle window glass 1 has a light-shielding region 6 on the peripheral portion of the glass plate 5. When the vehicle window glass 1 is a laminated glass, at least one of the peripheral portion of the interior surface of the vehicle-interior glass plate and the peripheral portion of the interior surface of the vehicle-exterior glass plate may have the light-shielding region 6. The light-shielding region 6 is formed, for example, by applying a ceramic color paste containing a black pigment and a meltable glass frit, followed by firing.

[0019] Further, a first area (information acquisition area) 10 is formed in the upper central area (area A) of the vehicle window glass 1, from which predetermined information can be acquired from outside the vehicle using an information acquisition device. In this embodiment, the information acquisition device is, for example, an on-board camera. In this case, the on-board camera can capture the view ahead of the vehicle through the transparent first area 10. The visible light transmittance of the first area 10 is preferably 70% or more so that the on-board camera can acquire a good image. In this embodiment, the information acquisition device may be something other than an on-board camera, such as a millimeter wave radar, an infrared sensor, or a raindrop sensor.

[0020] As shown in Fig. 2, the first region 10 is formed so as to be surrounded by the light-shielding region 6. The vehicle window glass 1 according to this embodiment also includes a conductive wire 20. The conductive wire 20 is configured to be able to heat the first region 10, and has a function of removing fogging from the first region 10. The light-shielding region 6 does not have to be formed below the first region 10.

[0021] The conductive wire 20 has a first heating portion 11 and a second heating portion 12. The first heating portion 11 is provided on the main surface of the vehicle interior side of the vehicle window glass 1, and heats a first region (information acquisition region) 10. The second heating portion 12 is provided in a second region 15 different from the first region 10 on the main surface of the vehicle interior side of the vehicle window glass 1, and is configured so that the overall resistance value of the conductive wire 20 can be adjusted. That is, in this embodiment, the resistance value of the second heating portion 12 is adjusted to adjust the overall resistance value of the conductive wire 20.

[0022] The resistance value of the second heat generating portion 12 can be adjusted, for example, by changing the width (cross-sectional area) or length of the electric heating wire 22 of the second heat generating portion 12. The smaller the width (cross-sectional area) of the electric heating wire 22 of the second heat generating portion 12, the higher the resistance value of the second heat generating portion 12, and the larger the width (cross-sectional area) of the electric heating wire 22 of the second heat generating portion 12, the lower the resistance value of the second heat generating portion 12. Also, the longer the length of the electric heating wire 22 of the second heat generating portion 12, the higher the resistance value of the second heat generating portion 12, and the shorter the length of the electric heating wire 22 of the second heat generating portion 12, the lower the resistance value of the second heat generating portion 12. Note that, in this embodiment, the purpose is to suppress the area of ​​the region occupied by the conductive wire 20 from becoming large. Therefore, it is preferable to adjust the resistance value of the second heat generating portion 12 by giving priority to adjusting the width (cross-sectional area) of the electric heating wire 22 of the second heat generating portion 12.

[0023] One end of the conductive wire 20 is connected to a terminal 41, and the other end is connected to a terminal 42. A power supply voltage is supplied to each of the terminals 41 and 42. Thus, a current flows through the conductive wire 20, and the first heating portion 11 and the second heating portion 12 generate heat. The conductive wire 20 may be formed by firing a conductive silver paste containing silver powder and glass frit. The components of the conductive silver paste are, for example, 60 to 90 mass % of silver powder, 1 to 10 mass % of glass powder, 5 to 30 mass % of inorganic additives, and an organic binder and an organic solvent added thereto as solid contents. In addition, the average particle diameter of the silver powder contained in the silver paste is preferably 0.1 to 10 μm. The thickness of the conductive wire 20 is preferably 5 to 20 μm.

[0024] Fig. 3 is a cross-sectional view of the vicinity of the second heat generating portion of the vehicle window glass according to the embodiment, taken along a line extending in the vertical direction of Fig. 2. A heat sink 30 is bonded to the surface of the second heat generating portion 12 opposite the vehicle window glass 1 using an adhesive 31. Specifically, as shown in Fig. 3, the heating wire 22 of the second heat generating portion 12 is formed on the main surface of the glass plate 5 of the vehicle window glass 1 on the vehicle interior side, and the heat sink 30 is bonded to the upper part of the heating wire 22 using an adhesive 31.

[0025] In this embodiment, it is preferable to use an adhesive with high thermal conductivity as the adhesive 31. As an example, the thermal conductivity of the adhesive 31 is preferably 0.3 W / (m·k) or more, and more preferably 0.3 to 1 W / (m·k). With such a configuration, the heat generated in the second heat generating portion 12 can be preferentially transferred to the heat sink 30 side. The thickness of the adhesive 31 is preferably 0.2 to 2.0 mm. Moreover, the area of ​​the adhesive 31 in plan view is 50 to 4000 mm. 2 It is preferable that the adhesive 31 is, for example, a silicone adhesive, an epoxy resin adhesive, a urethane adhesive, or the like. In the present embodiment, the adhesive 31 may be a double-sided tape.

[0026] The heat sink 30 is a member for dissipating heat generated in the second heat generating portion 12. The heat sink 30 is preferably made of a material having a thermal conductivity of 0.3 W / (m·k) or more, and may be made of, for example, a resin or a metal material having high thermal conductivity. In particular, it is preferable to make the heat sink 30 out of a metal material having high thermal conductivity. Since the heat sink 30 dissipates heat into the air, it is preferable that the surface area of ​​the heat sink 30 is large. Therefore, it is preferable to provide the surface of the heat sink 30 with irregularities. Note that a part of the heat generated in the second heat generating portion 12 is also dissipated from the glass plate 5.

[0027] 2, in this embodiment, the second region 15 is formed in a light-shielding region 6 provided around the vehicle window glass 1. By forming the second heat-generating portion 12 in the light-shielding region 6 in this manner, it is possible to prevent the second heat-generating portion 12 from being visible from outside the vehicle, thereby improving the design of the vehicle.

[0028] Fig. 4 is a diagram showing an example of the configuration of a conductive wire provided in a vehicle window glass according to this embodiment. As shown in Fig. 4, the conductive wire 20 is connected to a terminal 41 and a terminal 42. Specifically, one end of the wiring 23 is connected to the terminal 41, and the other end of the wiring 23 is connected to one end of the heating wire 22 of the second heating portion 12. The other end of the heating wire 22 of the second heating portion 12 is connected to one end of the wiring 24, and the other end of the wiring 24 is connected to one end of the heating wire 21 of the first heating portion 11. The other end of the heating wire 21 of the first heating portion 11 is connected to one end of the wiring 25, and the other end of the wiring 25 is connected to the terminal 42. When a power supply voltage is supplied to each of the terminals 41 and 42, a current flows through the conductive wire 20, and the first heating portion 11 and the second heating portion 12 generate heat.

[0029] The heating wire 21 of the first heat generating portion 11 is provided so that the heating wire 21 moves back and forth from side to side, and a part of the heating wire 21 passes through the first region (information acquisition region) 10. In this way, the first region (information acquisition region) 10 is heated using the heating wire 21. In the first region 10, the interval between adjacent heating wires 21 in the vertical direction is, for example, 10 to 30 mm.

[0030] The heating wire 22 of the second heating section 12 is provided between the wiring 23 and the wiring 24, and heats the second region 15. The heating wire 22 has a predetermined resistance value, and the heating wire 22 is used to adjust the overall resistance value of the conductive wire 20. For example, the width of the heating wire 22 of the second heating section 12 may be narrower than the width of the wirings 23, 24, and 25. This allows the resistance value of the heating wire 22 to be higher than the wirings 23, 24, and 25. The heating wire 22 of the second heating section 12 is intended to adjust the overall resistance value of the conductive wire 20. Therefore, as long as the resistance value of the heating wire 22 can be adjusted to a predetermined resistance value, the heat generation amount of the heating wire 22 is not particularly limited.

[0031] In the present embodiment, the widths of the heating wire 21 of the first heat generating portion 11, the wirings 23, 24, and 25, and the heating wire 22 of the second heat generating portion 12 may be narrower in the order of the wirings 23, 24, and 25, the heating wire 22 of the second heat generating portion 12, and the heating wire 21 of the first heat generating portion 11. With this configuration, the heat value of the heating wire 21 of the first heat generating portion 11 can be secured, while the overall resistance value of the conductive wire 20 can be adjusted using the heating wire 22 of the second heat generating portion 12. For example, the width of the heating wire 21 of the first heat generating portion 11 may be 0.30 to 0.40 mm, the widths of the wirings 23, 24, and 25 may be 0.6 to 1.0 mm, and the width of the heating wire 22 of the second heat generating portion 12 may be 0.30 to 0.60 mm. Moreover, the width of the wires 23, 24, 25 may be 0.65 to 0.75 mm, and the width of the heating wire 22 of the second heat generating portion 12 may be 0.30 to 0.55 mm.

[0032] For example, when the width (cross-sectional area) of the heating wire 22 of the second heating portion 12 is half the width (cross-sectional area) of the wirings 23, 24, and 25, the heating wire 22 having half the length of the wirings 23, 24, and 25 can obtain a resistance value equivalent to that of the wirings 23, 24, and 25. Thus, the resistance value of the wiring can be increased while shortening the length of the wiring. Therefore, the area occupied by the conductive wire 20 in the vehicle window glass 1 having an anti-fogging function can be prevented from increasing.

[0033] 4 shows a configuration example in which the heating wire 21 of the first heat generating portion 11 and the heating wire 22 of the second heat generating portion 12 are connected via wiring 24. However, in this embodiment, the heating wire 21 of the first heat generating portion 11 and the heating wire 22 of the second heat generating portion 12 may be directly connected. In this case, the first heat generating portion 11 and the second heat generating portion 12 are formed continuously.

[0034] FIG. 5 is a diagram showing another example of the configuration of the heating wire of the second heat generating portion 12. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5. In this embodiment, as shown in FIG. 5, the heating wire 22 constituting the second heat generating portion 12 may be provided to move back and forth between the left and right to form a zigzag shape. This configuration can increase the resistance value of the heating wire 22 while reducing the area of ​​the second region 15. In addition, the amount of heat transferred from the heating wire 22 of the second heat generating portion 12 to the heat sink 30 increases, so that the heat dissipation efficiency of the heat sink 30 can be improved. In addition, the interval between the heating wires 22 adjacent to each other in the vertical direction in the second region 15 is preferably smaller than the interval between the heating wires 21 adjacent to each other in the vertical direction in the first region 10. The interval between the heating wires 22 adjacent to each other in the vertical direction is, for example, 5 to 10 mm. This configuration can further increase the resistance value of the heating wire 22 while reducing the area of ​​the second region 15.

[0035] The area of ​​the adhesive 31 applied on the heating wire 22 in a plan view may be larger than the area of ​​the heat sink 30 in a plan view. For example, as shown in FIG. 5, the width of the adhesive 31 in the left-right and up-down directions may be larger than the width of the heat sink 30. In this way, by making the application area of ​​the adhesive 31 larger than the area of ​​the heat sink 30, the temperature gradient between the heating wire 22 and the heat sink 30 can be made gentle, and the stress generated between the heating wire 22 and the heat sink 30 can be suppressed. In addition, as shown in the cross-sectional view of FIG. 6, the adhesive 31 is filled between the zigzag heating wire 22, so that the temperature gradient between the heating wire 22 and the heat sink 30 can be made gentle.

[0036] The shape formed by the line connecting one end and the other end of the heating wire 22 and the heating wire 22 moving back and forth is not limited to the rectangular shape shown in Fig. 5, but may be a triangular shape, a polygonal shape, a semicircular shape, a semielliptical shape, or the like. The heating wire 22 may be formed in a zigzag shape so that the line connecting one end and the other end of the heating wire 22 intersects with the heating wire 22 moving back and forth. The zigzag shape here includes wave shapes such as a triangular wave shape, a rectangular wave shape, a circular arc wave shape, and a sine wave shape.

[0037] Fig. 7 is a diagram showing another configuration example of the heating wire 22 of the second heat generating portion 12. In this embodiment, as shown in Fig. 7, the heating wire 22 may be formed in a zigzag shape so that a line connecting one end and the other end of the heating wire 22 crosses the heating wire 22 that travels back and forth to the left and right. The configuration example shown in Fig. 7 shows an example in which the heating wire 22 has a sine wave shape. Note that other configurations in Fig. 7 are similar to the configuration examples shown in Figs. 5 and 6, so repeated explanations will be omitted.

[0038] Fig. 8 is an enlarged front view showing another configuration example of a vehicle window glass according to an embodiment. In the configuration example shown in Fig. 8, a bracket 50 is provided on the main surface of the vehicle interior side of the vehicle window glass 2, and the heat sink is formed using the bracket 50. The rest of the configuration is the same as the configuration of the vehicle window glass 1 described in Fig. 2.

[0039] 8, the conductive wire 20 has a first heat generating portion 11 and a second heat generating portion 12. The first heat generating portion 11 is provided on the main surface of the vehicle interior side of the vehicle window glass 2, and heats a first region (information acquisition region) 10. The second heat generating portion 12 is provided in a second region 15 different from the first region 10 on the main surface of the vehicle interior side of the vehicle window glass 2, and is configured so that the overall resistance value of the conductive wire 20 is adjustable.

[0040] In the configuration example shown in Fig. 8, the second heat generating portion 12 is disposed at a location where the bracket 50 is provided in a plan view. Then, adhesive 32 is applied to the surface of the second heat generating portion 12 opposite the vehicle window glass 2, i.e., onto the heating wire 22, and the bracket 50 is adhered using the adhesive 32. With this configuration, the heat generated by the second heat generating portion 12 can be transferred to the bracket 50 via the adhesive 32. Therefore, the heat generated by the second heat generating portion 12 can be dissipated from the bracket 50 into the air.

[0041] The bracket 50 is also adhered to the vehicle window glass 2 with an adhesive at other positions. For example, an adhesive that prioritizes thermal conductivity may be used for the adhesive 32 applied to the positions corresponding to the heating wire 22, and an adhesive that prioritizes adhesive strength may be used for the adhesive applied to positions other than the positions corresponding to the heating wire 22. With this configuration, the bracket 50 can be firmly fixed to the vehicle window glass 2 while efficiently dissipating heat generated in the second heat generating portion 12.

[0042] The bracket 50 is a member for attaching an information acquisition device such as an on-board camera to the vehicle window glass 2, and is made of a resin material or the like. For example, the resin material may be polybutylene terephthalate (PBT) or a mixture of polycarbonate (PC) and acrylonitrile butadiene styrene (ABS). Glass fiber may also be mixed into these resins. When the bracket 50 is also used as a heat sink as in the configuration example shown in FIG. 8, it is preferable that the bracket 50 is made of a material with high thermal conductivity.

[0043] After the information acquisition device is fixed to the bracket 50, a cover (not shown) is attached to the bracket 50. In this embodiment, a cover may be provided so as to cover the first region 10 and the second region 15. In such a configuration, the first heat generating portion 11 and the second heat generating portion 12 are covered by the cover, so that the temperature inside the cover increases, improving the anti-fogging function.

[0044] A bracket is also attached in the configuration example shown in Fig. 2. In the configuration example shown in Fig. 2, the heat sink 30 and the bracket may be configured not to overlap when viewed in a plan view. Also, a cover may be provided so as to cover the first region 10 and the second region 15. In this case, since the heat sink 30 is covered with a cover, the surrounding air can be heated using thermal radiation from the heat sink 30, improving the anti-fogging function.

[0045] In the configuration example described above, the second heat generating portion 12 is provided on the terminal 41 side, but in the present embodiment, the second heat generating portion 12 may be provided on the terminal 42 side, or the second heat generating portion 12 may be provided on both the terminal 41 side and the terminal 42 side. In other words, the second heat generating portion 12 may be configured using at least one of a first heating wire connected to one side (terminal 41 side) of the first heat generating portion 11 and a second heating wire connected to the other side (terminal 42 side) of the first heat generating portion 11.

[0046] Fig. 9 is a diagram showing another example of the configuration of the conductive wire included in the vehicle window glass according to the present embodiment. In the example shown in Fig. 9, the second heat generating portion 12 is configured using a first heating wire 22a connected to one side of the first heat generating portion 11 and a second heating wire 22b connected to the other side of the first heat generating portion 11, and a heat sink 30 is bonded using an adhesive across the first heating wire 22a and the second heating wire 22b.

[0047] One end of the wiring 26a is connected to a terminal 41, and the other end of the wiring 26a is connected to one end of the heating wire 22a of the second heat generating portion 12. The other end of the heating wire 22a of the second heat generating portion 12 is connected to one end of the wiring 27a, and the other end of the wiring 27a is connected to one end of the heating wire 21 of the first heat generating portion 11. The other end of the heating wire 21 of the first heat generating portion 11 is connected to one end of the wiring 27b, and the other end of the wiring 27b is connected to one end of the heating wire 22b of the second heat generating portion 12. The other end of the heating wire 22b of the second heat generating portion 12 is connected to one end of the wiring 26b, and the other end of the wiring 26b is connected to a terminal 42.

[0048] In the configuration example shown in Fig. 9, the first heating wire 22a and the second heating wire 22b of the second heat generating part 12 are arranged so as to be close to each other. In other words, the distance between the heating wires 22a and 22b extending parallel to each other is narrower than the distance between the wirings 27a and 27b extending parallel to each other. By arranging in this way, the area of ​​the second heat generating part 12 can be reduced. In addition, the heat can be efficiently dissipated by using the heat sink 30 or the bracket 50.

[0049] Although the present invention has been described above in accordance with the above-described embodiment, the present invention is not limited to the configuration of the above-described embodiment, and naturally includes various modifications, alterations, or combinations that a person skilled in the art could make within the scope of the invention of the claims of the present application. [Explanation of symbols]

[0050] 1, 2 Vehicle window glass 5. Glass Plate 6 Shading area 10 First area (information acquisition area) 11 First heating section 12 Second heating section 15 Second area 20 Conductive Wire 21, 22, 22a, 22b heating wire 23, 24, 25, 26a, 26b, 27a, 27b Wiring 30 Heat sink 31, 32 Adhesive 41, 42 Terminals 50 Bracket

Claims

1. A first area is provided at a predetermined position of a vehicle window glass, and is capable of acquiring predetermined information from outside the vehicle using an information acquisition device; a conductive wire capable of heating the first region; The conductive wire is A first heating portion is provided on a main surface of the vehicle window glass on an interior side thereof and heats the first region; a second heating portion provided in a second region different from the first region on a main surface of the vehicle interior side of the vehicle window glass, the second heating portion being capable of adjusting an overall resistance value of the conductive wire; A heat sink is bonded to a surface of the second heat generating portion opposite to the vehicle window glass using an adhesive. Vehicle window glass.

2. The vehicle window glass according to claim 1 , wherein the second region is formed in a light-shielding region provided around the vehicle window glass.

3. the conductive line further includes a wiring connecting the first heat generating portion and the second heat generating portion, The width of the heating wire of the second heating portion is narrower than the width of the wiring. The vehicle window glass according to claim 1 or 2.

4. 4. The vehicle window glass according to claim 3, wherein widths of the heating wire of the first heating portion, the wiring, and the heating wire of the second heating portion decrease in the order of the wiring, the heating wire of the second heating portion, and the heating wire of the first heating portion.

5. 4. The vehicle window glass according to claim 3, wherein the width of the heating wire of the first heating portion is 0.30 to 0.40 mm, the width of the wiring is 0.60 to 1.0 mm, and the width of the heating wire of the second heating portion is 0.30 to 0.60 mm.

6. 3. The vehicle window glass according to claim 1, wherein the heating wire constituting the second heating portion is formed in a zigzag shape.

7. The vehicle window glass according to claim 6 , wherein an interval between adjacent heating wires in the vertical direction in the second region is smaller than an interval between adjacent heating wires in the vertical direction in the first region.

8. The vehicle window glass according to claim 6, wherein the heating wire constituting the second heating portion is formed in a zigzag shape so that a line connecting one end and the other end of the heating wire intersects with the heating wire that travels back and forth between the left and right.

9. The vehicle window glass according to claim 1 , wherein the first region is a region in which an on-board camera is disposed as the information acquisition device.

10. 3. The vehicle window glass according to claim 1, wherein the adhesive has a thermal conductivity of 0.3 W / (m·k) or more.

11. A bracket is provided on a main surface of the vehicle window glass facing an interior side of the vehicle, A cover is attached to the bracket so as to cover the first area and the second area. The vehicle window glass according to claim 1 or 2.

12. A bracket is provided on a main surface of the vehicle window glass facing an interior side of the vehicle, The heat sink is configured using the bracket. The vehicle window glass according to claim 1 or 2.

13. 3. The vehicle window glass according to claim 1, wherein the second heating portion is configured using at least one of a first heating wire connected to one side of the first heating portion and a second heating wire connected to the other side of the first heating portion.

14. The second heat generating portion is configured using a first heating wire connected to one side of the first heat generating portion and a second heating wire connected to the other side of the first heat generating portion, The heat sink is bonded to the first heating wire and the second heating wire using an adhesive. The vehicle window glass according to claim 1 or 2.

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