Vehicle windowpane

Abstract

Provided is a vehicle windowpane having a good temperature distribution in a wiring-prohibited region.　According to the present invention, a defogger includes a pair of bus bars extending in a vertical direction of a glass plate, and a plurality of heating wires, wherein: the glass plate includes a first anti-fog region extending in a left-right direction between the pair of bus bars, and a second anti-fog region formed so as to surround the wiring-prohibited region; the plurality of heating wires include a first heating wire, a second heating wire, and a third heating wire, which are provided in the second anti-fog region; and either the first heating wire and the second heating wire are connected to one another at connecting portions positioned around the wiring-prohibited region to form one combined heating wire which extends in the left-right direction above the wiring-prohibited region, and the third heating wire has a segment that extends in the left-right direction below the wiring-prohibited region, or the first heating wire has a segment that extends in the left-right direction above the wiring-prohibited region, and the second heating wire and the third heating wire are connected to one another at connecting portions positioned around the wiring-prohibited region to form one combined heating wire which extends in the left-right direction below the wiring-prohibited region.

Description

Vehicle window glass

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to vehicle glazings.

[0002] BACKGROUND ART A conventional technology for a vehicle rear glass that is disposed inside the vehicle and has an antenna and a defogger heating wire formed thereon, which combines the defrosting of an imaging range (wiring prohibited area) of an on-board camera that images the outside of the vehicle through the rear glass and the securing of an area for arranging an antenna, includes a vehicle window glass that includes a glass plate for a vehicle window, a defogger provided on the glass plate, and an antenna provided on the glass plate, wherein the defogger has a first defrosting area formed by a pair of bus bars extending in the vertical direction of the glass plate and a plurality of first heating wires connected between the pair of bus bars and extending in the left-right direction of the glass plate, and a second defrosting area formed to surround the wiring prohibited area by at least one second heating wire connected to the pair of bus bars or the first defrosting area and extending to one side in the vertical direction, and the antenna is provided in at least one area to the left of the second defrosting area or to the right of the second defrosting area. A technique is known in which the second heating wire is formed in one stroke (see, for example, Patent Document 1).

[0003] International Publication No. 2019 / 017246

[0004] However, in a configuration in which at least one second heating wire surrounds the wiring-prohibited area in a single stroke, as in conventional vehicle window glass, there are parts of the wiring-prohibited area that cannot be surrounded, so there is room for improvement in the temperature distribution in the wiring-prohibited area.

[0005] Therefore, an object of the present invention is to provide a vehicle window glass that has a good temperature distribution in a wiring prohibited area.

[0006] A vehicle window glass according to an embodiment of the present disclosure is a glass sheet for a vehicle window, and includes: a glass sheet having a wiring prohibited area; and a defogger provided on the glass sheet, wherein the defogger has a pair of bus bars extending in a vertical direction of the glass sheet; and a plurality of heating wires connected between the pair of bus bars and extending in a left-right direction of the glass sheet, and the glass sheet has a first anti-fogging area extending in the left-right direction between the pair of bus bars; and a second anti-fogging area formed so as to surround the wiring prohibited area, and the plurality of heating wires include first, second, and third heating wires provided in the second anti-fogging area. the first heating wire and the second heating wire are connected to each other at connection parts located around the wiring prohibited area to form a single composite heating wire, and the composite heating wire has a section extending in the left-right direction above the wiring prohibited area, and the third heating wire has a section extending in the left-right direction below the wiring prohibited area, or the first heating wire has a section extending in the left-right direction above the wiring prohibited area, and the second heating wire and the third heating wire are connected to each other at connection parts located around the wiring prohibited area to form a single composite heating wire, and the composite heating wire has a section extending in the left-right direction below the wiring prohibited area.

[0007] A vehicle window glass having a good temperature distribution in the wiring prohibited area can be provided.

[0008] Fig. 1 is a plan view showing an example of the configuration of a vehicle window glass of an embodiment as viewed from inside the vehicle. Fig. 2 is an enlarged view showing an example of the configuration of a portion surrounding a wiring prohibited area in the overall configuration of the vehicle window glass of an embodiment. Fig. 3 is a diagram showing an example of a simulation result of temperature distribution in the vehicle window glass of an embodiment. Fig. 4 is a diagram showing an example of a simulation result of temperature distribution in the vehicle window glass of an embodiment. Fig. 5 is a diagram showing an example of a simulation result of temperature distribution in a comparative vehicle window glass. Fig. 6 is a diagram showing an example of the configuration of a first heating wire, a second heating wire and a third heating wire in a second anti-fogging area of ​​a vehicle window glass of a first modified embodiment of an embodiment. Fig. 7 is a diagram showing an example of the configuration of a vehicle window glass of a second modified embodiment of an embodiment.

[0009] Embodiments of the present invention will be described below with reference to the drawings. In each embodiment, deviations in directions such as parallel, right-angle, horizontal, vertical, up-down, and left-right are permitted to a degree that does not impair the effects of the present invention. Each plan view shows the glass surface of a vehicle window glass (hereinafter also referred to as "window glass") viewed from the opposite side, and shows the window glass installed in the vehicle from a perspective from inside the vehicle (interior view). If the window glass is a windshield installed in the front of the vehicle or a rear glass installed in the rear of the vehicle, the up-down direction of each plan view corresponds to the up-down direction of the vehicle, and the left-right direction of each plan view corresponds to the width direction of the vehicle. Furthermore, the window glass is not limited to a windshield or a rear glass, and may be, for example, a side glass installed on the side of the vehicle. In each plan view, the direction parallel to the X-axis (X-axis direction), the direction parallel to the Y-axis (Y-axis direction), and the direction parallel to the Z-axis (Z-axis direction) respectively represent the left-right direction of the glass plate, the up-down direction of the glass plate, and the direction perpendicular to the surface of the glass plate (also referred to as the normal direction). The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0010] 1 is a plan view showing an example of the configuration of a vehicle window glass 100 as viewed from inside the vehicle. As an example, the vehicle window glass 100 has an axisymmetric configuration with a line passing through the center in the left-right direction in the up-down direction as an axis of symmetry in a plan view.

[0011] The vehicle window glass 100 shown in Fig. 1 is an example of a rear window attached to the rear of a vehicle. The vehicle window glass 100 includes a glass plate 110 for a vehicle window and a defogger 120 provided on the glass plate 110. The defogger 120 has bus bars 130L and 130R and a plurality of heating wires 140.

[0012] The bus bars 130L, 130R and the multiple heating wires 140 are formed, for example, by printing and baking a paste containing a conductive metal (e.g., silver paste) on the interior surface of the glass plate 110. Examples of printing methods for the conductive metal paste include screen printing, offset printing, gravure printing, flexographic printing, and inkjet printing. The bus bars 130L, 130R and the multiple heating wires 140 formed in this manner have substantially the same thickness. Since the thicknesses of the multiple heating wires 140 are substantially the same, the wider (thicker) the width (line width) of each heating wire 140, the thicker the heating wire 140. The thickness of the bus bars 130L, 130R and the multiple heating wires 140 may be 5 μm or more and 20 μm or less. The width of the multiple heating wires 140 may be 0.15 mm or more and 1.0 mm or less, or 0.15 mm or more and 0.5 mm or less.

[0013] Note that the method for forming the bus bars 130L, 130R and the plurality of heating wires 140 is not limited to the above-described method. For example, the bus bars 130L, 130R and the plurality of heating wires 140 may be formed by providing a linear or foil body containing a conductive material such as copper on the interior or exterior surface of the glass plate 110. Alternatively, the bus bars 130L, 130R and the plurality of heating wires 140 may be attached to the glass plate 110 with an adhesive or the like, or may be provided inside (inner layer of) the glass plate 110 itself.

[0014] A camera 20 for capturing an image of the outside of the vehicle can be mounted on the interior side of the vehicle window glass 100. Fig. 1 is a plan view showing the vehicle window glass 100 as seen from the interior side of the vehicle, with the position of the camera 20 indicated by a dashed line. More specifically, the position of the camera 20 is the position of the lens of the camera 20. The imaging range of the camera 20 is set to a wiring prohibited area 113 in a plan view.

[0015] The camera 20 is mounted on the interior side of the vehicle relative to the glass plate 110, and is a device (image capturing unit) that captures an image of the outside of the vehicle (the rear of the vehicle in this embodiment) through the glass plate 110. For example, an image captured by the camera 20 is displayed on a display inside the vehicle, thereby helping the driver of the vehicle to visually recognize the situation around the vehicle.

[0016] A lamp may be provided in the wiring prohibited area 113 instead of the camera 20. The lamp may be, for example, a high-mounted stop lamp. The lamp emits light to notify the driver of a following vehicle that the brakes of the vehicle have been applied. The lamp is mounted on the interior side of the glass plate 110 and emits light through the glass plate 110 toward the outside of the vehicle (toward the rear of the vehicle in this embodiment).

[0017] <Glass Plate 110> The glass plate 110 is an example of a glass plate for a vehicle window. The outer shape of the glass plate 110 is approximately rectangular. The upper edge 110U represents the glass edge on the upper side of the glass plate 110, and the lower edge 110B represents the glass edge on the lower side of the glass plate 110 (the side opposite the upper edge 110U). The left edge 110L represents the glass edge on the left side of the glass plate 110, and the right edge 110R represents the glass edge on the right side of the glass plate 110 (the side opposite the left edge 110L). The left edge 110L is the glass edge adjacent to the left side of the upper edge 110U and the lower edge 110B, and the right edge 110R is the glass edge adjacent to the right side of the upper edge 110U and the lower edge 110B.

[0018] The glass plate 110 has a pair of side edges. The left edge 110L is an example of a first side edge, which is one of the pair of side edges, and the right edge 110R is an example of a second side edge, which is the other of the pair of side edges. The connection between the upper edge 110U and the left edge 110L is connected with a curvature, but may be connected without a curvature. The shapes of the connection between the other edges are similar.

[0019] The glass plate 110 has a first antifogging area 111, a second antifogging area 112, a wiring prohibited area 113, and a hiding film 115. The following description will be made with reference to Fig. 2 in addition to Fig. 1. Fig. 2 is an enlarged view showing an example of the configuration of a portion surrounding the wiring prohibited area 113 within the overall configuration of the vehicle window glass 100. The camera 20 is omitted from Fig. 2.

[0020] <First antifogging region 111> The first antifogging region 111 is the antifogging region of the glass plate 110 excluding the second antifogging region 112 located in the upper center and the wiring prohibited region 113 surrounded by the second antifogging region 112. The antifogging region of the glass plate 110 is a region that extends inward from the substantially rectangular region of the entire glass plate 110 in which the multiple heating wires 140 are provided, and is an antifogging region in which fogging is removed by the heat generated by the multiple heating wires 140.

[0021] The first antifogging region 111 is a generally U-shaped region consisting of the portion of the antifogging region of the glass plate 110 from the lower edge 110B side to the lower end of the second antifogging region 112 and left and right portions of the second antifogging region 112. As an example, the portion of the antifogging region from the lower edge 110B side to the lower end of the second antifogging region 112 is the portion where the fourth to fourteenth heating wires 140A from the top of the 14 heating wires 140 extend in the left-right direction. The outer edge of the first antifogging region 111 is located outside the portion of the opening 115A of the hiding film 115 other than the protrusion 115A1.

[0022] <Second antifogging region 112> The second antifogging region 112 is a region obtained by excluding the wiring prohibited region 113 from the central portion in the left-right direction of the upper end portion of the antifogging region of the glass plate 110. As an example, the upper end portion of the antifogging region is a region where the first to third heating wires 141, 142, and 143 from the top of the 14 heating wires 140 are provided in the up-down direction of the glass plate 110.

[0023] The second antifogging region 112 surrounds the wiring prohibited region 113. The second antifogging region 112 is a substantially rectangular annular region surrounding the wiring prohibited region 113. FIG. 2 shows an inner edge 112A of the second antifogging region 112. The inner edge 112A is the inner edge of the substantially rectangular annular second antifogging region 112. The region inside the inner edge 112A is not included in the second antifogging region 112. The wiring prohibited region 113 is located inside the inner edge 112A of the second antifogging region 112. The second antifogging region 112 overlaps with substantially the entire convex portion 115A1 of the concealing film 115. As an example, the lower end of the second antifogging region is located between the third heating wire 143 and the fourth heating wire 140A. In Figures 1 and 2, the lower end of the convex portion 115A1 of the shielding film 115 protrudes downward below the second antifogging region 112, but the lower end of the convex portion 115A1 may also be contained within the second antifogging region 112.

[0024] <Wiring Prohibited Area 113> The wiring prohibited area 113 is an area surrounded by the second anti-fogging area 112 in the central portion in the left-right direction on the upper edge 110U side of the glass plate 110. The wiring prohibited area 113 is an area where wiring of heating wires, antennas, etc. is prohibited, and is, for example, a trapezoidal area in a plan view with a bottom base longer than an top base. The outer edge of the wiring prohibited area 113 is trapezoidal. The wiring prohibited area 113 includes an imageable area defined by the angle of view of the camera 20 installed inside the vehicle facing the rear, and is an area wider than the imageable area defined by the angle of view. Images captured by the camera 20 can be displayed on a display or the like of the vehicle.

[0025] The composite heat ray 141M of the first heat ray 141 and the second heat ray 142, and the third heat ray 143 surround the wiring prohibited area 113 and are located outside the wiring prohibited area 113, so that the composite heat ray 141M and the third heat ray 143 can be prevented from appearing in the image captured by the camera 20. Furthermore, when a voltage is applied between the pair of bus bars 130L, 130R, the composite heat ray 141M and the third heat ray 143 are energized and generate heat, so that heat is transferred from the second anti-fogging area 112 outside the wiring prohibited area 113 to the wiring prohibited area 113, thereby removing fogging within the wiring prohibited area 113.

[0026] Here, an example will be described in which the wiring prohibited area 113 is located in the center in the left-right direction on the upper edge 110U side of the glass plate 110, but the wiring prohibited area 113 may be located in a part other than the center in the left-right direction on the upper edge 110U side of the glass plate 110. As an example, the wiring prohibited area 113 may be located to the right or left of the center in the left-right direction on the upper edge 110U side of the glass plate 110.

[0027] <Concealing Film 115> The concealing film 115 is a frame-shaped film provided along the outer edges (upper edge 110U, left edge 110L, lower edge 110B, and right edge 110R) of the glass plate 110. The concealing film 115 has an opening 115A that exposes substantially the entire area inside the outer edges of the glass plate 110 and an opening 115B that exposes the wiring prohibited area 113. The opening 115A has a convex portion 115A1 that protrudes downward from the upper edge 110U side and a convex portion 115A2 that protrudes upward from the lower edge 110B side so as to surround the wiring prohibited area 113 in the upper central portion of the glass plate 110. The convex portion 115A1 protrudes downward to surround the wiring prohibited area 113, and the convex portion 115A2 protrudes upward to avoid the drive shaft of a wiper (not shown). The opening 115B is provided in the protrusion 115A1 and is a trapezoidal opening in a plan view that exposes the entire wiring prohibited area 113. The opening area of ​​the opening 115B is equal to the wiring prohibited area 113.

[0028] The concealing film 115 avoids the wiring prohibited area 113, thereby preventing the concealing film 115 from appearing in the image captured by the camera 20. A specific example of the concealing film 115 is ceramics such as a black ceramic film. The concealing film 115 is formed by printing and baking a ceramic paste containing a black pigment and glass frit on the interior surface of the glass plate 110. Examples of printing methods for the ceramic paste containing a black pigment and glass frit include screen printing, offset printing, gravure printing, flexographic printing, and inkjet printing. When the glass plate 110 is viewed from the outside of the vehicle, the portion overlapping with the concealing film 115 is invisible from outside the vehicle, resulting in a glass plate 110 with an excellent design.

[0029] <Defogger 120> The defogger 120 is an electrically heated conductor pattern that removes fogging from the glass sheet 110. The defogger 120 has a plurality of heating wires 140 extending in the left-right direction of the glass sheet 110 and a plurality of bus bars 130L, 130R that supply power to the plurality of heating wires 140. In this embodiment, the glass sheet 110 is provided with 14 heating wires 140 that extend parallel to one another in the left-right direction of the glass sheet 110 and a pair of bus bars 130L, 130R connected to the 14 heating wires 140. When a voltage is applied between the pair of bus bars 130L, 130R, the 14 heating wires 140 are energized and generate heat, thereby removing fogging from the glass sheet 110.

[0030] <Bus bars 130L, 130R> The bus bars 130L, 130R are conductor patterns that extend in the up-down direction along the left edge 110L and the right edge 110R of the glass plate 110. The left bus bar 130L is an example of a first bus bar, and the right bus bar 130R is an example of a second bus bar. Fourteen heating wires 140 are connected between the bus bars 130L, 130R. The bus bars 130L, 130R are located outside the opening 115A of the shielding film 115 and overlap with the shielding film 115.

[0031] For example, bus bar 130L is connected to one terminal (for example, a positive terminal) of a DC power supply (not shown) of the vehicle, and bus bar 130R is connected to the other terminal (for example, a negative terminal) of the DC power supply (not shown) of the vehicle. DC power is supplied to bus bars 130L and 130R from the DC power supply (not shown) of the vehicle.

[0032] 1 are clearly wider than the heating wire 140, the bus bars 130L, 130R may have a width similar to that of the heating wire 140. However, because the bus bars 130L, 130R are located at the left and right ends of the first anti-fogging region 111, they do not contribute to heating the first anti-fogging region 111 regardless of their width. Furthermore, although the bus bars 130L, 130R are located inside the first anti-fogging region 111 in FIG. 1, the bus bars 130L, 130R may be located outside the first anti-fogging region 111.

[0033] <Hot wires 140> The 14 hot wires 140 are conductor patterns connected between the bus bars 130L and 130R. Here, as an example, a description will be given assuming that a current flows from the left bus bar 130L to the right bus bar 130R. The width of the hot wires 140 refers to the line width.

[0034] Each of the 14 heating wires 140 has a left end connected to the left bus bar 130L and a right end connected to the right bus bar 130R. The left end of each heating wire 140 is the connection between the left bus bar 130L and the heating wire 140, and the right end of each heating wire 140 is the connection between the right bus bar 130R and the heating wire 140. The left and right ends of the 14 heating wires 140 overlap with the shielding film 115.

[0035] The upper three of the 14 heat rays 140 are the first heat ray 141, the second heat ray 142, and the third heat ray 143. The first heat ray 141 is the highest and first heat ray from the top, the second heat ray 142 is the second heat ray from the top, and the third heat ray 143 is the third heat ray from the top. When the upper three of the 14 heat rays 140 are to be particularly distinguished, they are referred to as the first heat ray 141, the second heat ray 142, and the third heat ray 143. When the fourth to fourteenth heat rays 140 from the top other than the upper three heat rays 140 (the first heat ray 141, the second heat ray 142, and the third heat ray 143) are to be distinguished, they are referred to as heat ray 140A. Furthermore, when the 14 heating wires 140 are not particularly distinguished from one another, they will simply be referred to as heating wires 140 .

[0036] Here, as an example, a configuration will be described in which the 14 heating wires 140 have a bilaterally symmetrical shape with a line passing through the center of the glass plate 110 in the left-right direction in the up-down direction as the axis of symmetry. However, the 14 heating wires 140 do not have to have a bilaterally symmetrical shape with respect to the above-mentioned axis of symmetry. As an example, if the wiring prohibited area 113 is located in a part other than the center in the left-right direction on the upper edge 110U side of the glass plate 110, the shape of the 14 heating wires 140 will be bilaterally asymmetric.

[0037] <Fourth to fourteenth heating wires 140A> The fourth to fourteenth heating wires 140A are connected between the bus bars 130L and 130R and extend in the left-right direction in a region of the first antifogging region 111 that is below the second antifogging region 112. Except for the left and right ends, the fourth to fourteenth heating wires 140A do not overlap the shielding film 115 and are located inside the opening 115A.

[0038] In order to heat the glass plate 110 evenly, the vertical spacing between the fourth to fourteenth heating wires 140A is approximately constant. Furthermore, it is preferable that the fourth to fourteenth heating wires 140A have approximately the same length between the bus bars 130L and 130R and the same resistance value. This allows the defogging speed to be uniform, preventing uneven defogging.

[0039] 1, the 13th heating wire 140A and the 14th heating wire 140A are connected to each other at the center in the left-right direction to form a single composite heating wire 140A1 in order to avoid the protrusion 115A2. If the 14th heating wire 140A were to bend upward to avoid the protrusion 115A2, the distance between the 14th heating wire 140A and the 13th heating wire 140A would be narrower, resulting in uneven temperature distribution. Therefore, by providing the composite heating wire 140A1, an even temperature distribution can be obtained.

[0040] <First to Third Heat Wires 141, 142, and 143> The first heat wire 141, the second heat wire 142, and the third heat wire 143 are connected between the bus bars 130L and 130R and extend in the left-right direction, similar to the fourth to fourteenth heat wires 140A, on the left and right sides of the protrusion 115A1 of the concealing film 115. The first heat wire 141, the second heat wire 142, and the third heat wire 143 are wired on the left and right sides of the protrusion 115A1 above the concealing film 115 at intervals substantially equal to the vertical intervals of the fourth to fourteenth heat wires 140A. Here, we will explain a form in which the first to third heating wires from the top of the 14 heating wires 140A are the first heating wire 141, the second heating wire 142, and the third heating wire 143, but one or more additional heating wires 140 may be provided above the first heating wire 141.

[0041] <First heating wire 141 and second heating wire 142> The first heating wire 141 and the second heating wire 142 are connected to each other at connection portions 141S provided on the left and right sides of the wiring prohibited area 113 (opening 115B) inside the convex portion 115A1, respectively, to form a single composite heating wire 141M. That is, the first heating wire 141 and the second heating wire 142 are integrated between the two connection portions 141S to form a single composite heating wire 141M.

[0042] The first heating wire 141 has a heating wire portion 141A that bends toward the second heating wire 142 and extends diagonally downward near the center of the glass plate 110 in the left-right direction. The lower end of the heating wire portion 141A is connected to the second heating wire 142 at a connection portion 141S. The heating wire portion 141A and the connection portion 141S are located within the second antifogging region 112 and overlap with the concealing film 115. Furthermore, a portion of the left-right extending portion of the first heating wire 141 that is closer to the heating wire portion 141A and a portion of the second heating wire 142 that is closer to the connection portion 141S are located within the second antifogging region 112 and overlap with the concealing film 115.

[0043] Although the embodiment in which two first heating wires 141 and two second heating wires 142 are connected at the connection portion 141S to form one composite heating wire 141M will be described here, another heating wire may be connected at the connection portion 141S in addition to the first heating wire 141 and the second heating wire 142 to form one composite heating wire 141M. In other words, three or more heating wires 140 may be connected at the connection portion 141S to form one composite heating wire 141M.

[0044] Although the configuration in which the connection portions 141S of the first heating wire 141 and the second heating wire 142 are provided on the left and right sides of the wiring prohibited area 113 is described here, the connection portions 141S may be provided on either the left or right side of the wiring prohibited area 113. In this case, as an example, on the left or right side of the wiring prohibited area 113 where the connection portions 141S are not present, only one of the first heating wire 141 and the second heating wire 142 is present. As an example, when the wiring prohibited area 113 is located in a portion other than the center portion in the left-right direction on the upper edge 110U side of the glass plate 110 and the shape of the 14 heating wires 140 is asymmetrical, the connection portions 141S may be provided on either the left or right side of the wiring prohibited area 113.

[0045] <Composite Heating Wire 141M> The composite heating wire 141M is a part of the first heating wire 141 and the second heating wire 142. As shown in Figure 2, the composite heating wire 141M has composite heating wire sections 141M1, 141M2, 141M3, 141M4, 141M5, 141M6, and 141M7. The composite heating wire 141M has a configuration in which the composite heating wire sections 141M1 to 141M7 are connected between two connecting sections 141S on the left and right. The composite heating wire 141M overlaps with the shielding film 115.

[0046] Composite heating wire portion 141M1 extends diagonally downward to the right from the connection portion 141S on the left side and is connected to composite heating wire portion 141M2. Composite heating wire portion 141M2 extends rightward from its connection with composite heating wire portion 141M1 to just before the wiring prohibited area 113 and is connected to composite heating wire portion 141M3. Composite heating wire portion 141M3 extends diagonally upward to the right from its connection with composite heating wire portion 141M2 along the left edge of the wiring prohibited area 113 and is connected to composite heating wire portion 141M4. Composite heating wire portion 141M4 extends rightward from its connection with composite heating wire portion 141M3 along the upper edge of the wiring prohibited area 113 and is connected to composite heating wire portion 141M5. Composite heating wire portion 141M5 extends diagonally downward to the right from its connection with composite heating wire portion 141M4 along the right edge of wiring prohibited area 113 and is connected to composite heating wire portion 141M6. Composite heating wire portion 141M6 extends right from its connection with composite heating wire portion 141M5 and is connected to composite heating wire portion 141M7. Composite heating wire portion 141M7 extends diagonally upward to the right from its connection with composite heating wire portion 141M6 to connection portion 141S on the right side.

[0047] The composite heating wire portion 141M1 extends diagonally downward to the right from the left connection portion 141S to increase the area of ​​the trapezoidal outer edge of the wiring prohibited area 113 that is surrounded by the composite heating wire 141M and the third heating wire 143. This is to ensure a uniform temperature distribution on the glass plate 110 in the wiring prohibited area 113. Furthermore, when viewed from the bus bar 130L side, the composite heating wire portion 141M1 is formed by the first heating wire 141 and the second heating wire 142 joining at the left connection portion 141S to form a single heating wire. Therefore, a combined current flows through the first heating wire 141 and the second heating wire 142. To ensure that the heat generation amounts of the first heating wire 141 and the second heating wire 142 on the left side of the left connection portion 141S are approximately equal to those of the composite heating wire portion 141M1, the width of the composite heating wire portion 141M1 is made wider than the widths of the first heating wire 141 and the second heating wire 142. As an example, because twice the current flowing through each of the first heating wire 141 and the second heating wire 142 flows through the composite heating wire portion 141M1, the width of the composite heating wire portion 141M1 is made wider than the width of the first heating wire 141 and the second heating wire 142. Due to the left-right symmetry of the composite heating wire portions 141M1 to 141M7, the configuration of the composite heating wire portion 141M1 is a left-right inverted configuration of the composite heating wire portion 141M7.

[0048] The vertical spacing between the composite heating wire portion 141M2 and the third heating wire 143 directly below it is narrower than the vertical spacing between the fourth to fourteenth heating wires 140A and the vertical spacing between the first to third heating wires 141 to 143. Therefore, the composite heating wire portion 141M2 is made wider than the width of the heating wire 140A and the first to third heating wires 141 to 143. By increasing the width of the composite heating wire portion 141M2 and reducing its resistance, the heat generation amount of the composite heating wire portion 141M2 is reduced compared to the heat generation amount of the third heating wire 143, and the temperature distribution in the area where the composite heating wire portion 141M2 and the third heating wire 143 are present is aligned with the surrounding temperature distribution. Note that due to the left-right symmetry of the composite heating wire portions 141M1 to 141M7, the configuration of the composite heating wire portion 141M2 is a left-right inverted configuration of the composite heating wire portion 141M6.

[0049] The composite heating wire sections 141M3-141M5 extend above the wiring prohibited area 113 along the upper, left, and right sections of the trapezoidal wiring prohibited area 113 in a plan view (the sections of the three sides other than the bottom base of the trapezoid). The composite heating wire section 141M4 is a section of the composite heating wire 141M that extends left and right above the wiring prohibited area 113. Furthermore, there are no heating wires above the composite heating wire sections 141M3-141M5. Therefore, the composite heating wire sections 141M3-141M5 serve to evenly heat approximately the upper half of the wiring prohibited area 113. The width of the composite heating wire sections 141M3-141M5 is narrower than the width of the composite heating wire section 141M2, and is configured to generate more heat than the composite heating wire section 141M2.

[0050] As an example, the width of the composite heating wire portions 141M3-141M5 is constant from the connection point of the composite heating wire portion 141M3 with the composite heating wire portion 141M2 to the connection point of the composite heating wire portion 141M5 with the composite heating wire portion 141M6. This is to uniformly heat the approximately upper half of the wiring prohibited area 113 with a uniform amount of heat generation. Note that, because the current that flows through the composite heating wire portion 141M2 flows directly through the composite heating wire portions 141M3-141M5, the width of the composite heating wire portions 141M3-141M5 is wider than the width of the first heating wire 141 and the second heating wire 142.

[0051] The composite heating wire portion 141M6 has a configuration obtained by flipping the composite heating wire portion 141M2 from side to side. The vertical distance between the composite heating wire portion 141M6 and the third heating wire 143 located directly below it is narrower than the vertical distance between the fourth to fourteenth heating wires 140A and the vertical distance between the first to third heating wires 141 to 143. Therefore, the width of the composite heating wire portion 141M6 is wider than the width of the heating wire 140A and the first to third heating wires 141 to 143.

[0052] The composite heating wire portion 141M7 has a configuration obtained by flipping the composite heating wire portion 141M1 from side to side. The composite heating wire portion 141M7 is positioned at the same position as the composite heating wire portion 141M1 in the vertical direction to increase the area of ​​the trapezoidal outer edge of the wiring prohibited area 113 that is surrounded by the composite heating wire 141M and the third heating wire 143, and to make the temperature distribution in the wiring prohibited area 113 symmetrical. The horizontal length of the composite heating wire portion 141M7 is equal to the horizontal length of the composite heating wire portion 141M1.

[0053] As described above, the composite heating wire portions 141M3 and 141M5 overlap with the concealing film 115. Since the 14 heating wires 140 extend in the left-right direction, which corresponds to the horizontal direction in most areas, heating wires that are angled relative to the left-right direction are easily noticeable. Furthermore, heating wires that extend in the left-right direction, which corresponds to the horizontal direction, are difficult for humans to see because they overlap with the horizontal part of the scenery seen through the glass plate 110, but heating wires that are angled relative to the left-right direction tend to be easy to see and noticeable.

[0054] Although the composite heating wire portions 141M3 and 141M5 are angled with respect to the left-right direction, they are located outside the opening 115B surrounding the wiring prohibited area 113 and overlap with the concealing film 115, making them inconspicuous. This allows for a good design without spoiling the appearance of the glass plate 110. The composite heating wire portions 141M3 and 141M5 do not have to overlap with the concealing film 115. In this case, the heating wire portion 141A of the first heating wire 141 also does not have to overlap with the concealing film 115.

[0055] <Third heating wire 143> The third heating wire 143 extends in the left-right direction below the wiring prohibited area 113. Directly below the wiring prohibited area 113, the third heating wire 143 is bent downward in a crank shape compared to the sections to the left and right of the wiring prohibited area 113 in order to avoid the wiring prohibited area 113. However, in cases where the bottom end of the wiring prohibited area 113 is located higher than in the configurations shown in Figures 1 and 2, or where the spacing between the multiple heating wires 140 is wide, the third heating wire 143 may not be bent between the bus bars 130L and 130R, but may extend linearly like the fourth to fourteenth heating wires 140.

[0056] The first heating ray 141 and the second heating ray 142 are integrated between two connection portions 141S on both sides of the wiring prohibited area 113 to form a single composite heating ray 141M, which extends along the left, upper, and right sections of the outer edge of the wiring prohibited area 113, and the third heating ray 143 extends along the lower section of the outer edge of the wiring prohibited area 113. The vertical distance between the composite heating ray portions 141M2 and 141M6 of the composite heating ray 141M and the third heating ray 143 is narrowed, so that the composite heating ray portions 141M2 and 141M6 are close to the third heating ray 143. Because the composite heating ray 141M and the third heating ray 143 surround almost the entire periphery of the wiring prohibited area 113, the temperature of the wiring prohibited area 113 of the glass plate 110 can be raised to a desired temperature and the temperature distribution can be made more uniform. Therefore, the cloudiness in the wiring prohibited area 113 can be removed evenly.

[0057] Furthermore, by making the composite heating wire portions 141M2 and 141M6 thicker than the third heating wire 143 to reduce the amount of heat generated, the temperature distribution between the third heating wire 143 and the composite heating wire portions 141M2 and 141M6 is made more uniform than in other parts. This makes it possible to raise the temperature of the wiring prohibited area 113 of the glass plate 110 to a desired temperature, and to make the temperature distribution more uniform, thereby ensuring the even removal of fogging in the wiring prohibited area 113.

[0058] <Simulation results of temperature distribution> Figures 3A and 3B are diagrams showing an example of the simulation results of the temperature distribution in the vehicle window glass 100 of the embodiment. Figure 3A shows the temperature distribution in the portion from the first heating wire 141 to the fourth heating wire 140A of the glass sheet 110, and Figure 3B shows an enlarged view of the temperature distribution in and around the wiring prohibited area 113. In Figure 3B, the wiring prohibited area 113 is indicated by a dashed trapezoid.

[0059] As an example, the temperature distribution 30 minutes after a predetermined current is applied between the bus bars 130L and 130R is shown in Figures 3A and 3B. Figure 3B also shows the state in which the widths of the composite heating wire portions 141M1 to 141M7 of the composite heating wire 141M are set as described above.

[0060] As shown in Figure 3A, an overall temperature distribution of approximately 25°C or higher was obtained in the portion of the glass plate 110 from the first heating wire 141 to the fourth heating wire 140A. The maximum temperature was 56.271°C at the center in the left-right direction of the third heating wire 143, as shown in Figure 3A. As shown in Figure 3B, the temperature was 27.0°C at the center of the wiring prohibited area 113, 30°C to 45°C at the center of the upper part of the wiring prohibited area 113, and 35°C at the lower corner of the wiring prohibited area 113, indicating a good temperature distribution within the wiring prohibited area 113. A good temperature distribution means a uniform temperature distribution with little temperature difference.

[0061] The width of the composite heating wire sections 141M3-141M5 is narrower than that of the composite heating wire section 141M2, and is configured to generate more heat than the composite heating wire section 141M2. Furthermore, the width of the composite heating wire sections 141M3-141M5 is constant from the junction of the composite heating wire section 141M3 with the composite heating wire section 141M2 to the junction of the composite heating wire section 141M5 with the composite heating wire section 141M6, resulting in a good temperature distribution within the wiring prohibited area 113, as shown in Figure 3B. It has been confirmed that the uniformity of the temperature distribution within the wiring prohibited area 113 decreases if the width of the composite heating wire sections 141M3-141M5 is not constant between the composite heating wire sections 141M2 and 141M6, as described above.

[0062] <Simulation results of temperature distribution in comparative vehicle window glass> Figures 3C and 3D are diagrams showing an example of simulation results of temperature distribution in a comparative vehicle window glass. The comparative vehicle window glass is the vehicle window glass disclosed in International Publication No. 2019 / 017246, which is described as Patent Document 1. Figure 3C shows the temperature distribution in a portion where three heating wires are installed from the upper side of the glass plate of the comparative vehicle window glass, and Figure 3C shows an enlarged view of the temperature distribution in the wiring prohibited area and its surroundings. Figure 3D shows the wiring prohibited area of ​​the comparative vehicle window glass as a dashed trapezoid.

[0063] As an example, the temperature distribution 30 minutes after a current of the same power as that passed in the simulation of the vehicle window glass 100 of the embodiment is passed between the left and right bus bars is shown in FIGS. 3C and 3D.

[0064] As shown in Figure 3C, a temperature distribution of approximately 25°C or higher was obtained in the area of ​​the first to third heating wires from the top, but it was found that the temperature above the wiring prohibited area was lower than that of the vehicle window glass 100 of the embodiment. The maximum temperature was 57.679°C in the area where the first heating wire bends on the left and right sides of the wiring prohibited area, as shown in Figure 3C. Furthermore, as shown in Figure 3D, the temperature was 26.1°C in the center of the wiring prohibited area, 26°C to 29°C in the center of the upper part of the wiring prohibited area, and 30°C at the lower corner of the wiring prohibited area. Compared to the wiring prohibited area 113 of the vehicle window glass 100 of the embodiment, the temperature was lower overall and the temperature difference was larger.

[0065] From the above, it has been confirmed that the vehicle window glass 100 of the embodiment is able to achieve an overall increase in temperature and an improved uniformity of temperature distribution within the wiring prohibited area 113 compared to the comparative vehicle window glass by providing a composite heating wire 141M, which combines the first heating wire 141 and the second heating wire 142, along the left side, upper side, and right side of the wiring prohibited area 113, and providing the third heating wire 143 along the lower side of the wiring prohibited area 113. By achieving an overall increase in temperature within the wiring prohibited area 113 and an improved uniformity of temperature distribution, the speed at which defogging is removed within the wiring prohibited area 113 can be made uniform throughout the wiring prohibited area 113, making it less likely that defogging will occur unevenly.

[0066] <First Modification> FIG. 4A is a diagram showing an example of the configuration of a first heating wire 141, a second heating wire 142, and a third heating wire 143 in the second antifogging area 112 of a vehicle window glass 100A according to a first modification of the embodiment.

[0067] 4A, the first heating wire 141 extends to the left and right above the wiring prohibited area 113, and the second heating wire 142 and the third heating wire 143 are connected to each other at two connection portions 142S located on the left and right sides of the wiring prohibited area 113 to form a single composite heating wire 142M. The first heating wire 141 is not connected to any other heating wires.

[0068] The third heating wire 143 has a heating wire portion 143A that bends toward the second heating wire 142 and extends diagonally upward near the center of the glass plate 110 in the left-right direction. The upper end of the heating wire portion 143A is connected to the second heating wire 142 at a connecting portion 142S. The heating wire portion 143A and the connecting portion 142S are located within the second antifogging region 112 and overlap with the concealing film 115, which is not shown in FIG. 4A. Furthermore, the left-right extending portions of the second heating wire 142 and the third heating wire 143 shown in FIG. 4A are located within the second antifogging region 112 and overlap with the concealing film 115, which is not shown in FIG. 4A.

[0069] <Composite Heating Wire 142M> The composite heating wire 142M is a part of the second heating wire 142 and the third heating wire 143. As shown in Fig. 4A, the composite heating wire 142M has composite heating wire sections 142M1, 142M2, 142M3, 142M4, 142M5, ​​142M6, and 142M7. The composite heating wire 142M has a configuration in which the composite heating wire sections 142M1 to 142M7 are connected between two connecting sections 142S on the left and right. The composite heating wire 142M overlaps with the concealing film 115, which is not shown in Fig. 4A.

[0070] Composite heating wire portion 142M1 extends diagonally upward to the right from the connection portion 142S on the left side and is connected to composite heating wire portion 142M2. Composite heating wire portion 142M2 extends rightward from its connection with composite heating wire portion 142M1 to just before the wiring prohibited area 113 and is connected to composite heating wire portion 142M3. Composite heating wire portion 142M3 extends diagonally downward to the left from its connection with composite heating wire portion 142M2 along the left edge of the wiring prohibited area 113 and is connected to composite heating wire portion 142M4. Composite heating wire portion 142M4 extends rightward from its connection with composite heating wire portion 142M3 along the lower edge of the wiring prohibited area 113 and is connected to composite heating wire portion 142M5. Composite heating wire portion 142M5 extends diagonally upward and left from its connection with composite heating wire portion 142M4 along the right edge of wiring prohibited area 113 and is connected to composite heating wire portion 142M6. Composite heating wire portion 142M6 extends diagonally right from its connection with composite heating wire portion 142M5 and is connected to composite heating wire portion 142M7. Composite heating wire portion 142M7 extends diagonally downward and right from its connection with composite heating wire portion 142M6 to connection portion 142S on the right side.

[0071] Due to the left-right symmetry of the composite heating wire sections 142M1-142M7, the configuration of the composite heating wire section 142M1 is a left-right inverted configuration of the composite heating wire section 142M7. The widths of the composite heating wire sections 142M1-142M7 may be set to the same as the widths of the composite heating wire sections 141M1-141M7 shown in Figure 2. In particular, the widths of the composite heating wire sections 142M3-142M5 may be set constant between the composite heating wire sections 142M2 and 142M6 to ensure an even temperature distribution in the wiring prohibited area 113.

[0072] As in a vehicle window glass 100A of a first modified example shown in FIG. 4A, the window glass 100 may be configured to include a composite heating ray 142M in which the second heating ray 142 and the third heating ray 143 are combined into one.

[0073] <Second Modification> Figure 4B is a diagram showing an example of the configuration of a vehicle window glass 100B according to a second modification of the embodiment. Figure 4B shows a simplified overall view, and further shows a simplified view of the multiple heating wires 140. The vehicle window glass 100B according to the second modification differs in the configuration of the hiding film 115 from the configuration of the hiding film 115 of the vehicle window glass 100 shown in Figures 1 and 2. Figure 4B omits components other than the glass plate 110, the wiring prohibited area 113, the hiding film 115, and the simplified multiple heating wires 140.

[0074] In the concealing film 115 of the second modification, the opening 115A has two protrusions 115A11 and 115A12. The two protrusions 115A11 and 115A12 have a configuration in which the portion of the protrusion 115A1 shown in FIG. 2 that is located below the wiring prohibited area 113 is omitted. Therefore, the lower section of the outer edge of the wiring prohibited area 113 is not surrounded by the concealing film 115. In addition, the third heating wire 143 extends left and right below the two protrusions 115A11 and 115A12 and does not have a section that overlaps with the concealing film 115.

[0075] As in the second modified vehicle window glass 100B shown in Figure 4B, the lower section of the outer edge of the wiring prohibited area 113 may not be surrounded by the concealing film 115, and the third heating ray 143 may not have a section overlapping with the concealing film 115.

[0076] <Effects> The vehicle window glass 100 is a glass sheet 110 for a vehicle window, and includes the glass sheet 110 having a wiring prohibited area 113, and a defogger 120 provided on the glass sheet 110. The defogger 120 has a pair of bus bars 130L, 130R extending in the up-down direction of the glass sheet 110, and a plurality of heating wires 140 connected between the pair of bus bars 130L, 130R and extending in the left-right direction of the glass sheet 110. The glass sheet 110 has a first anti-fogging area 111 extending in the left-right direction between the pair of bus bars 130L, 130R, and a second anti-fogging area 112 formed to surround the wiring prohibited area 113. The plurality of heating wires 140 include a first heating wire 141, a second heating wire 142, and a and a third heating ray 143, the first heating ray 141 and the second heating ray 142 being connected to each other at a connection 141S located around the wiring prohibited area 113 to form a single composite heating ray 141M, the composite heating ray 141M having a section extending in the left-right direction above the wiring prohibited area 113, and the third heating ray 143 having a section extending in the left-right direction below the wiring prohibited area 113, or the first heating ray 141 having a section extending in the left-right direction above the wiring prohibited area 113, the second heating ray 142 and the third heating ray 143 being connected to each other at a connection 142S located around the wiring prohibited area 113 to form a single composite heating ray 142M, the composite heating ray 142M having a section extending in the left-right direction below the wiring prohibited area 113. Therefore, the wiring prohibited area 113 can be heated from above by the combined heating ray 141M and from below by the third heating ray 143. Alternatively, the wiring prohibited area 113 can be heated from above by the first heating ray 141 and from below by the combined heating ray 142M.

[0077] Therefore, it is possible to provide a vehicle window glass 100 having a good temperature distribution in the wiring prohibited area 113.

[0078] Furthermore, the glass sheet 110 has a concealing film 115 formed along the outer edge of the glass sheet 110 in a plan view, and the concealing film 115 surrounds the outer edge of the wiring prohibited area 113. A section of the third heating ray 143 extending in the left-right direction below the wiring prohibited area 113 or a section of the composite heating ray 142M extending in the left-right direction below the wiring prohibited area 113 may overlap with the concealing film 115. Therefore, the section of the third heating ray 143 extending in the left-right direction below the wiring prohibited area 113 or the section of the composite heating ray 142M extending in the left-right direction below the wiring prohibited area 113 cannot be seen from outside the vehicle. Therefore, a vehicle window glass 100 can be provided that has excellent design and good temperature distribution in the wiring prohibited area 113.

[0079] Furthermore, the glass sheet 110 has a concealing film 115 formed along the outer edge of the glass sheet 110 in a plan view, the concealing film 115 surrounding the upper, left, and right sections of the top, bottom, left, and right sections of the outer edge of the wiring prohibited area 113, but not provided in the lower section of the outer edge of the wiring prohibited area 113, and the section extending left and right below the wiring prohibited area 113 of the third heating ray 143 or the section extending left and right below the wiring prohibited area 113 of the composite heating ray 142M may be exposed from the concealing film 115. Therefore, the section extending left and right below the wiring prohibited area 113 of the third heating ray 143 or the section extending left and right below the wiring prohibited area 113 of the composite heating ray 142M can be seen from outside the vehicle, but the portion of the glass sheet 110 covered by the concealing film 115 can be reduced. Therefore, it is possible to provide a vehicle window glass 100 in which the portion of the glass plate 110 covered by the hiding film 115 is reduced, and in which the temperature distribution in the wiring prohibited area 113 is good.

[0080] Furthermore, the composite heating ray 141M of the first heating ray 141 and the second heating ray 142 may be thicker than the portion other than the composite heating ray 141M of the first heating ray 141 and the second heating ray 142, or the composite heating ray 142M of the second heating ray 142 and the third heating ray 143 may be thicker than the portion other than the composite heating ray 142M of the second heating ray 142 and the third heating ray 143. Because the current flowing through both the first heating ray 141 and the second heating ray 142 flows through the composite heating ray 141M, making the width of the composite heating ray 141M thicker than the width of the portion other than the composite heating ray 141M of the first heating ray 141 and the second heating ray 142 reduces the amount of heat generated in the composite heating ray 141M and makes the temperature distribution more uniform. Furthermore, since the current that flows through both the second heating wire 142 and the third heating wire 143 flows through the composite heating wire 142M, by making the width of the composite heating wire 142M thicker than the width of the parts of the second heating wire 142 and the third heating wire 143 other than the composite heating wire 142M, the heat generation amount in the composite heating wire 142M can be made equal to the heat generation amount of the parts of the second heating wire 142 and the third heating wire 143 other than the composite heating wire 142M, and the temperature distribution in the wiring prohibited area 113 can be made more uniform.

[0081] Furthermore, the composite heating wire 141M of the first heating wire 141 and the second heating wire 142 is provided along the upper, left, and right sections of the top, bottom, left, and right sections of the outer edge of the wiring prohibited area 113, and the thickness of the portions where the composite heating wire 141M is provided along the upper, left, and right sections may be thicker than the portions other than the composite heating wire 141M of the first heating wire 141 and the second heating wire 142. Because the current that flows through both the first heating wire 141 and the second heating wire 142 flows through the composite heating wire 141M, by making the width of the composite heating wire 141M thicker than the width of the portions other than the composite heating wire 141M of the first heating wire 141 and the second heating wire 142, the heat generation amount of the composite heating wire 141M can be made equal to the heat generation amount of the portions other than the composite heating wire 141M of the first heating wire 141 and the second heating wire 142. By arranging such a composite heat wire 141M along the upper section, the left section, and the right section of the upper, lower, left, and right sections of the outer edge of the wiring prohibited area 113, the temperature within the wiring prohibited area 113 can be raised to the desired temperature and the temperature distribution within the wiring prohibited area 113 can be made more uniform.

[0082] The first heating wire 141 and the second heating wire 142 extend in the left-right direction to the left of the wiring prohibited area 113 and also extend in the left-right direction to the right of the wiring prohibited area 113, and the connection portion 141S is made up of the connection portion 141S located on the left side of the wiring prohibited area 113 and the connection portion 141S located on the right side of the wiring prohibited area 113, and the composite heating wire 141M of the first heating wire 141 and the second heating wire 142 connects the connection portion 141S located on the left side of the wiring prohibited area 113 and the connection portion 141S located on the right side of the wiring prohibited area 113, and may have a section extending in the left-right direction above the wiring prohibited area 113. In a configuration in which the composite heating wire 141M extends between the left and right first heating wires 141 and second heating wire 142, the wiring prohibited area 113 can be heated from above by the composite heating wire 141M and from below by the third heating wire 143. Therefore, in a configuration in which the composite heating wire 141M extends between the left and right first heating wires 141 and second heating wires 142, a vehicle window glass 100 can be provided that has a good temperature distribution in the wiring prohibited area 113.

[0083] The second heating ray 142 and the third heating ray 143 extend in the left-right direction to the left of the wiring prohibited area 113 and also extend in the left-right direction to the right of the wiring prohibited area 113, and the connection portion 142S is made up of the connection portion 142S located on the left side of the wiring prohibited area 113 and the connection portion 142S located on the right side of the wiring prohibited area 113, and the composite heating ray 142M of the second heating ray 142 and the third heating ray 143 connects the connection portion 142S located on the left side of the wiring prohibited area 113 with the connection portion 142S located on the right side of the wiring prohibited area 113, and may have a section extending in the left-right direction below the wiring prohibited area 113. In a configuration in which the composite heating ray 142M extends between the left and right second heating ray 142 and third heating ray 143, the wiring prohibited area 113 can be heated from above by the first heating ray 141 and from below by the composite heating ray 142M. Therefore, in a configuration in which the composite heating wire 142M extends between the second heating wire 142 and the third heating wire 143 on the left and right, it is possible to provide a vehicle window glass 100 with a good temperature distribution in the wiring prohibited area 113.

[0084] While exemplary vehicle window panes according to the present disclosure have been described above, the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and variations are possible without departing from the scope of the claims.

[0085] This international application claims priority based on Japanese Patent Application No. 2023-010467, filed on January 26, 2023, the entire contents of which are incorporated herein by reference.

[0086] 20 Camera 100, 100A, 100B Vehicle window glass 110 Glass plate 110B Lower edge 110L Left edge 110R Right edge 110U Upper edge 111 First anti-fogging area 112 Second anti-fogging area 112A Inner edge 113 Wiring prohibited area 115 Hiding film 115A Opening 115A1, 115A11, 115A12 Convex portion 115A2 Convex portion 115B Opening 120 Defogger 130L, 130R Bus bar 140, 140A Heating wire 140A1 Composite heating wire 141 First heating wire 141A Heating wire portion 141M Composite heating wire 141M1 to 141M7 Composite heating wire portion 141S Connection portion 142 Second heating wire 142M Composite heating wire 142M1 to 142M7 Composite heating wire section 142S Connection section 143 Third heating wire 143A Heating wire section

Claims

1. a glass plate for a vehicle window, the glass plate having a wiring prohibited area; a defogger provided on the glass plate; Including, The defogger is a pair of bus bars extending in the up-down direction of the glass plate; a plurality of heating wires connected between the pair of bus bars and extending in the left-right direction of the glass plate; and The glass plate is a first antifogging region extending in the left-right direction between the pair of bus bars; a second antifogging area formed to surround the wiring prohibited area; and the plurality of heating wires include a first heating wire, a second heating wire, and a third heating wire provided in the second antifogging region; The first heating wire and the second heating wire are connected to each other at a connection portion located around the wiring prohibited area to form a single composite heating wire, the composite heating wire having a section extending in the left-right direction above the wiring prohibited area, and the third heating wire having a section extending in the left-right direction below the wiring prohibited area, or The first heating wire has a section extending in the left-right direction above the wiring prohibited area, and the second heating wire and the third heating wire are connected to each other at a connection portion located around the wiring prohibited area to form a single composite heating wire, and the composite heating wire has a section extending in the left-right direction below the wiring prohibited area.

2. the glass plate has a concealing film formed along an outer edge of the glass plate in a plan view, the concealing film surrounds the outer edge of the wiring prohibited area, 2. The vehicle window glass according to claim 1, wherein a section of the third heating ray extending in the left-right direction below the wiring prohibited area or a section of the composite heating ray extending in the left-right direction below the wiring prohibited area overlaps with the shielding film.

3. the glass plate has a concealing film formed along an outer edge of the glass plate in a plan view, the concealing film surrounds an upper section, a left section, and a right section among sections on the top, bottom, left, and right of the outer edge of the wiring prohibited area, and is not provided in a lower section of the outer edge of the wiring prohibited area; 2. The vehicle window glass according to claim 1, wherein a section of the third heating ray extending in the left-right direction below the wiring prohibited area or a section of the composite heating ray extending in the left-right direction below the wiring prohibited area is exposed from the concealing film.

4. The composite heat ray of the first heating wire and the second heating wire is thicker than a portion of the first heating wire and the second heating wire other than the composite heat ray, or The vehicle window glass according to claim 1 , wherein the composite heat ray of the second heating ray and the third heating ray is thicker than a portion of the second heating ray and the third heating ray other than the composite heat ray.

5. the composite heating wire of the first heating wire and the second heating wire is provided along an upper section, a left section, and a right section among upper, lower, left, and right sections of an outer edge of the wiring prohibited area, 4. The vehicle window glass according to claim 1, wherein the thickness of the composite heating wire in the upper section, the left section, and the right section is greater than the thickness of the composite heating wire in the first heating wire and the second heating wire other than the composite heating wire.

6. the first heating wire and the second heating wire extend in the left-right direction on the left side of the wiring prohibited area and extend in the right-left direction on the right side of the wiring prohibited area, the connection portion includes a connection portion located to the left of the wiring prohibited area and a connection portion located to the right of the wiring prohibited area, 4. The vehicle window glass according to claim 1, wherein the composite heat ray of the first heat ray and the second heat ray connects a connection portion located on the left side of the wiring prohibited area with a connection portion located on the right side of the wiring prohibited area, and has a section extending in the left-right direction above the wiring prohibited area.

7. the second heating wire and the third heating wire extend in the left-right direction on the left side of the wiring prohibited area and extend in the right-left direction on the right side of the wiring prohibited area, the connection portion includes a connection portion located to the left of the wiring prohibited area and a connection portion located to the right of the wiring prohibited area, 4. The vehicle window glass according to claim 1, wherein the composite heating ray of the second heating ray and the third heating ray connects a connection portion located on the left side of the wiring prohibited area with a connection portion located on the right side of the wiring prohibited area, and has a section extending in the left-right direction below the wiring prohibited area.