JP7205341B2 - vehicle glass - Google Patents

Description

The present invention relates to vehicular glazing.

2. Description of the Related Art In order to maintain the visibility of a driver by anti-fogging and anti-icing in an automobile windshield, there is known a technique of heating the windshield by energizing a transparent conductive film provided between a plurality of glass plates. The transparent conductive film is a heating layer that heats the glass plate. There is also known a technique in which an antenna capable of receiving radio waves of a predetermined frequency is incorporated into a glass plate for automobiles, so that the electric heating function of the transparent conductive film and the radio wave reception function of the antenna coexist.

For example, Patent Document 1 discloses a configuration in which a heating layer provided on the windshield, a first bus bar, a second bus bar, and an antenna including a portion electrically connected to the heating layer are used together. there is The first bus bar and the second bus bar are strip-shaped electrodes provided above and below the heating layer for passing current through the heating layer and extending in the width direction of the vehicle body of the automobile.

Japanese Patent Publication No. 2018-502428

Here, when the antenna is composed of a pattern having elements extending mainly in the horizontal direction, the width in the horizontal (horizontal) direction is wider than the width in the vertical (vertical) direction of the antenna in the area where the antenna is arranged. Become. When such an antenna with a wide width in the horizontal direction is arranged independently from the heating layer that is energized by the upper and lower bus bars extending in the vehicle width direction, as disclosed in Patent Document 1, the area of the heating layer can be reduced and the anti-fogging and anti-icing effects can be reduced. Conventional vehicle glass is not intended for such an antenna installation. There is room for improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle glass capable of receiving radio waves of a predetermined frequency while suppressing deterioration of the anti-fogging and anti-icing effects of the glass plate.

In order to solve the above-described problems and achieve the object, a vehicle glass according to the present invention includes a glass plate provided in an opening of a vehicle body, and an upper bus bar provided on the upper side of the glass plate and extending in a substantially horizontal direction. and a lower bus bar provided below the glass plate and extending in a substantially horizontal direction. The vehicle glass includes a heating region for heating the glass plate by a voltage applied between the upper bus bar and the lower bus bar, and an upper side portion of the opening and the an antenna provided in at least a portion of the upper region between the upper busbar. The antenna has a feeding portion and a plurality of elements connected to the feeding portion, and is arranged in an antenna region in which the length in the horizontal direction is longer than the length in the vertical direction when the glass plate is viewed in plan. . When the distance from the upper side of the antenna area to the upper side of the opening is D1, and the distance from the lower side of the antenna area to the upper bus bar is D2, D1 is 5 mm or more, and D2 is 20 mm or more. The upper bus bar has a crank portion bent like a crank, and the upper region has a recessed region that is depressed in a direction from the upper side of the opening toward the upper bus bar with the crank portion as a boundary. is formed, the antenna is provided in the recessed region, and the shortest distance from the antenna to the crank portion is D8, and the D8 is 20 mm or more.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to receive the electric wave of a predetermined frequency, suppressing the fall of the anti-fogging and anti-icing effect of a glass plate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structural example of the glass for vehicles 100 which concerns on embodiment of this invention. 3 is a diagram showing an opening 210 of the vehicle body 200; FIG. 2 is an enlarged view of the antenna area 5 shown in FIG. 1 and the periphery of the antenna area 5; FIG. FIG. 10 is a diagram showing measurement results of antenna gain when the value of D2 is changed while the value of D1 is fixed at a constant value; It is a figure which shows the 1st modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 2nd modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 3rd modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 4th modification of the vehicle glass 100 which concerns on embodiment of this invention. It is a figure which shows the 5th modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 6th modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 7th modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 8th modification of the glass for vehicles 100 which concerns on embodiment of this invention. It is a figure which shows the 9th modification of the glass for vehicles 100 which concerns on embodiment of this invention.

EMBODIMENT OF THE INVENTION Below, the vehicle glass which concerns on embodiment of this invention is demonstrated in detail based on drawing. In each form, deviations in parallel, right-angled, horizontal, vertical, up-down, left-right, etc. directions are allowed to the extent that the effects of the present invention are not impaired. The X-axis direction, the Y-axis direction, and the Z-axis direction respectively represent directions parallel to the X-axis, directions parallel to the Y-axis, and directions parallel to the Z-axis. The X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other. The XY plane, YZ plane, and ZX plane are virtual planes parallel to the X-axis direction and Y-axis direction, virtual planes parallel to the Y-axis direction and Z-axis direction, and virtual planes parallel to the Z-axis direction and X-axis direction, respectively. represents

Embodiment.
FIG. 1 is a diagram showing a configuration example of a vehicle glass 100 according to an embodiment of the present invention. FIG. 2 is a diagram showing the opening 210 of the vehicle body 200. As shown in FIG. FIG. 1 shows a vehicle glass 100 viewed from the inside of a vehicle body 200, which is the skeleton of an automobile, toward the front. The vehicle glass 100 is applied, for example, to an automobile windshield or rear glass. In the present embodiment, an example in which the vehicle glass 100 is applied to a windshield will be described for the sake of simplicity.

1 and 2 onward, the X-axis and the Y-axis are two axes that are perpendicular to each other. A direction parallel to the X-axis is defined as the X-axis direction. The X-axis direction is equal to the left-right direction (horizontal direction) of the vehicle body 200, the vehicle width direction of the vehicle body 200, or the horizontal direction. Of the X-axis directions, the direction indicated by the arrow is the positive X-axis direction, and the opposite direction is the negative X-axis direction. A direction parallel to the Y-axis is defined as a Y-axis direction. The Y-axis direction is equal to the vertical direction (longitudinal direction) of the vehicle body 200 or the vertical direction. Of the Y-axis directions, the upward direction indicated by the arrow is the positive Y-axis direction, and the downward direction, which is the opposite direction, is the negative Y-axis direction.

An upper side portion 201 of the vehicle body 200 in the plus Y-axis direction is equal to the edge of a flange provided on the roof (ceiling) of the vehicle body 200 . A lower side portion 202 of the vehicle body 200 in the negative Y-axis direction is equal to the edge of a flange provided on the dash panel of the vehicle body 200 . A side portion 203 of the vehicle body 200 in the positive X-axis direction is equal to the edge of the flange of the right A-pillar toward the front of the vehicle body 200 . A side portion 203 of the vehicle body 200 in the negative X-axis direction is equal to the edge of the flange of the left A-pillar toward the front of the vehicle body 200 .

The vehicle glass 100 includes a glass plate 1, an upper bus bar 3 provided on the upper side of the glass plate 1 and extending in a substantially horizontal direction, a lower bus bar 4 provided on the lower side of the glass plate 1 and extending in a substantially horizontal direction, It has a heating area 2 and an antenna 50 . Note that the substantially horizontal direction also includes a direction parallel to a line segment forming an angle of, for example, 0° to ±15° with respect to a horizontal plane perpendicular to the vertical direction.

The glass plate 1 is a transparent or translucent plate-shaped dielectric provided in the opening 210 of the vehicle body 200 shown in FIG. Opening 210 is a space surrounded by a flange provided on vehicle body 200 .

The heating area 2 is provided between the upper busbar 3 and the lower busbar 4 and is a transparent or translucent conductive material which heats the glass sheet 1 by means of a voltage applied between the upper busbar 3 and the lower busbar 4 . It has a membrane, etc. Moreover, the heating area 2 may have a transparent conductive film, a surface of the glass plate 1 provided with heat generating wires, a heat generating silver-based print, or the like. As enlarged in FIG. 1, the heating region 2 has, for example, a plurality of wavy heating wires 21 arranged at predetermined intervals. As the plurality of wavy heating wires 21, those wired in a wavy form from the upper busbar 3 toward the lower busbar 4 can be used. When a voltage is applied between the upper bus bar 3 and the lower bus bar 4, a current flows through the heating region 2, and the heating region 2 generates heat, thereby heating the glass plate 1. As shown in FIG. As a result, it is possible to melt snow, melt ice, and prevent fogging of the plate glass. Copper, aluminum, chromium, molybdenum, nickel, titanium, palladium, indium, tungsten, gold, platinum, silver, and alloys containing a plurality of these can be used as wires for heat generation.

When the heating region 2 is composed of a transparent conductive film, antimony-doped tin oxide, bismuth-doped tin oxide, or fluorine-doped tin oxide can be used as the material of the transparent conductive film.

When the glass plate 1 is, for example, laminated glass having a resin interlayer sandwiched between two glass plates, the heating region 2 is not limited to being formed by the above-described wavy heating wire 21, and may be formed by a plurality of plates. It may be arranged so as to extend in a plane between the dielectrics, or may be arranged so as to be sandwiched between an intermediate film (not shown) and one of the plate-shaped dielectrics. Alternatively, the heating region 2 may be coated with a conductive material (such as silver) by vapor deposition on the surface of the glass plate 1 by a sputtering method or the like.

In the vehicle glass 100 according to the present embodiment, the end portion 6 of the heating region 2 provided on the left side of the opening 210 and the end portion 6 of the heating region 2 provided on the right side of the opening 210 are the glass plate 1 are arranged so that the distance between them increases in the horizontal direction (X-axis direction) from top to bottom.

The upper bus bar 3 is a strip-shaped electrode connected to the upper side of the heating region 2 and is connected to the ground portion via the electrode 31 . The ground portion includes the negative electrode of a DC power supply such as a battery, the vehicle body 200 (frame ground), and the like. The upper bus bar 3 may be a strip electrode connected to the upper side of the heating region 2, and is not limited to one strip electrode extending in the horizontal direction.

The lower bus bar 4 is a strip-shaped electrode connected to the lower side of the heating region 2 and is connected to the power source through the electrode 41 . The power supply unit is, for example, the positive electrode of a DC power supply such as a battery. Note that the lower bus bar 4 may be a strip electrode connected to the lower side of the heating region 2, and is not limited to one strip electrode extending in the horizontal direction.

Alternatively, the upper bus bar 3 may be connected to the power source and the lower bus bar 4 may be connected to the ground. Further, when the glass plate 1 is laminated glass, each of the upper bus bar 3 and the lower bus bar 4 may be arranged between a plurality of plate-like dielectrics, or an intermediate film (not shown) and one of the plate-like dielectrics. It may be sandwiched between the dielectric and arranged. Moreover, each of the upper bus bar 3 and the lower bus bar 4 may be arranged in the same layer as the heating region 2, or may be arranged in different layers if electrical connection with the heating region 2 can be secured via an auxiliary member. good.

Antenna 50 is, for example, a dipole antenna that receives horizontally polarized waves in the frequency band of digital terrestrial television broadcasting (DTV) (frequency band is about 470 to 710 MHz), and has feeding portions as two electrodes. Each element constituting the antenna 50 will be described with reference to FIG. 3, which corresponds to an enlarged view of the antenna 50 in FIG. When the antenna 50 is a dipole antenna, for example, the inner conductor of a coaxial cable extending from a signal processing device (not shown) is electrically connected to the first feeding section 61 (HOT), and the outer conductor of the coaxial cable is connected to the first 2 is electrically connected to the power supply portion 62 (GND). In addition, the second power supply portion 62 is also called an earth portion that is connected to the ground.

An antenna 50 is provided in at least part of the upper region 8 . The upper region 8 is a region between the upper side portion 201 (the upper side portion of the opening 210 ) of the vehicle body 200 and the upper bus bar 3 in the entire region of the glass plate 1 viewed from above. The antenna 50 has an element 50 a connected to the first feeding section 61 and an element 50 b connected to the second feeding section 62 , and is arranged in the antenna area 5 . Note that the element 50a is also referred to as a feed side element, and the element 50b is also referred to as a ground side element.

The element 50a is an antenna conductor formed so as to be suitable for receiving horizontally polarized waves of DTV radio waves. The element 50a is connected to, for example, a signal processing circuit (not shown). The element 50a has, for example, a first element 50a1, a second element 50a2, a third element 50a3 and a fourth element 50a4. The first element 50a1 extends from the first power supply portion 61 in the plus X-axis direction. The second element 50a2 is arranged apart from the first element 50a1 in the negative Y-axis direction, and extends from the first power feeding portion 61 in the positive X-axis direction. The third element 50a3 extends from the end of the first element 50a1 to the end of the second element 50a2, contacts the first element 50a1 and the second element 50a2, and extends further in the negative Y-axis direction than the second element 50a2. . The fourth element 50a4 is arranged apart from the second element 50a2 in the negative Y-axis direction and extends in the negative X-axis direction from the end of the third element 50a3. The first element 50a1, the second element 50a2 and the fourth element 50a4 are connected to each other via the third element 50a3. In particular, the first power feeding portion 61, the first element 50a1, the second element 50a2 and the third element 50a3 form a loop element, and the third element 50a3 and the fourth element 50a4 form the second power feeding portion 62 side ( (minus X-axis direction).

The element 50b is a conductor connected to the vehicle body 200, for example. The element 50b has, for example, a fifth element 50b1, a sixth element 50b2 and a seventh element 50b3. The fifth element 50b1 extends from the second power supply portion 62 in the negative Y-axis direction. The sixth element 50b2 extends in the minus X-axis direction from the midpoint of the fifth element 50b1. The seventh element 50b3 is arranged apart from the sixth element 50b2 in the negative Y-axis direction, and extends in the positive X-axis direction and the negative X-axis direction from the end of the fifth element 50b1. The sixth element 50b2 and the seventh element 50b3 are connected to each other via the fifth element 50b1. The antenna 50 may have an auxiliary element (not shown) for antenna gain adjustment for the elements 50a and 50b.

The antenna region 5 is a horizontally elongated region in which the length in the horizontal direction is longer than the length in the vertical direction when the glass plate 1 is viewed in plan. It is a substantially rectangular area with a minimum area. Antenna area 5 is provided between upper side portion 201 of vehicle body 200 and upper bus bar 3 . The antenna region 5 is the narrowest horizontally long region including at least all the antenna patterns in the region including the feeding portions (first feeding portion 61 and second feeding portion 62) and the antenna patterns (elements 50a and 50b). be. By making the antenna area 5 oblong, the height of the antenna 50 in the Y-axis direction can be lowered, and while the heating area 2 is widened, horizontally polarized waves in the entire frequency band of DTV radio waves can be received satisfactorily.

Note that FIG. 1 shows an arrangement in which the antenna area 5 is provided near the side portion 203 of the vehicle body 200 in the negative X-axis direction. However, the position where the antenna region 5 is provided may be a predetermined position described later between the upper side portion 201 of the vehicle body 200 and the upper bus bar 3, and may be near the center of the vehicle body 200 in the X-axis direction. may also be closer to the side portion 203 in the plus X-axis direction.

In many cases, a camera module (not shown) is installed between the upper side portion 201 of the vehicle body 200 and the upper bus bar 3 and near the center in the X-axis direction. When the camera module is installed at such a position, in order to reduce the influence of noise generated from the camera module, the antenna area 5 should be placed near either one of the two left and right sides 203, or It is desirable to provide two locations near both the left and right side portions 203 .

FIG. 3 is an enlarged view of the antenna area 5 and the periphery of the antenna area 5 shown in FIG. Here, the distance from the upper side portion 51 of the antenna region 5 to the upper side portion 201 of the vehicle body 200 (the upper side portion of the opening 210) is defined as D1, and the distance from the lower side portion 52 of the antenna region 5 to the upper bus bar 3 is defined as D2. In this case, D1 should be 5 mm or more, and D2 should be 20 mm or more. The top edge 51 of the antenna area 5 is equal to the top of the antenna 50 . The top of the antenna 50 is the end of the first feeding portion 61 in the positive Y-axis direction, the end of the second feeding portion 62 in the positive Y-axis direction, and the upper side of the vehicle body 200 of the first element 50a1. 201 is the closest part. Also, the lower side portion 52 of the antenna area 5 is equal to the lowest portion of the antenna 50 . The lowest part of the antenna 50 corresponds in this case to the seventh element 50b3.

The distance D1 corresponds to, for example, the shortest distance obtained by connecting the portions where the first power supply portion 61 or the first element 50a1 and the upper side portion 201 of the vehicle body 200 are closest to each other with an imaginary straight line. As the value of D1 increases, the leakage (attenuation) of the signal received by the antenna 50 to the vehicle body 200 is reduced, and the noise from the vehicle body 200 mixed into the signal received by the antenna 50 is reduced. This is because, when the distance D1 is set to 5 mm or more, it is easy to suppress deterioration in antenna performance due to capacitive coupling between the antenna 50 and the metal body (vehicle body 200). Moreover, the distance D1 is preferably 6 mm or more, and more preferably 8 mm or more. On the other hand, if the distance D1 is too long, the heating region 2 may be narrowed. In general, the distance may be set to a value from 5 mm to 10 mm for reasons of design, such as hiding the feeding point in the interior.

The distance D2 corresponds to, for example, the shortest distance obtained by connecting the portions where the seventh element 50b3 and the upper bus bar 3 are closest to each other with an imaginary straight line. As the value of D2 increases, the leakage of the signal received by antenna 50 to upper bus bar 3 is reduced, and the amount of noise from upper bus bar 3 mixed into the signal received by antenna 50 is reduced.

However, as the values of D1 and D2 increase, the vertical width of the heating region 2 tends to decrease, so the anti-fogging and anti-icing effects of the glass plate 1 may decrease. Therefore, in the vehicle glass 100 according to the present embodiment, while enabling the reception of radio waves in a predetermined frequency band, the reduction in the anti-fogging and anti-icing effects of the glass plate 1 can be suppressed. Measurements of antenna gains have led to setting the optimal values for D1 and D2.

The length of each antenna element used to measure the antenna gain is as follows.

First element 50a1: 100 mm
Second element 50a2: 100 mm
Third element 50a3: 15 mm
Fourth element 50a4: 115 mm
Fifth element 50b1: 15 mm
Sixth element 50b2: 85mm
Seventh element 50b3: 115 mm
The length of the first power supply portion 61 and the second power supply portion 62 in the Y-axis direction is 19 mm. , plus 50 mm in the X-axis direction. Thereby, the antenna area 5 is a substantially rectangular shape extending in the horizontal direction with a size of 207 mm×34 mm.

FIG. 4 is a diagram showing the measurement results of the antenna gain when the value of D2 is changed while the value of D1 is fixed at a constant value. The vertical axis in FIG. 4 is antenna gain (unit: dBi), and the horizontal axis is frequency. The antenna gain data in FIG. 4 is obtained when D1 is set to 5 mm, the center of the vehicle body 200 assembled with the vehicle glass 100 is set at the center of the turntable, and the vehicle body 200 is rotated 360°. is a plot of the average antenna gain of . The average value of the antenna gain is, for example, the average value of a plurality of data measured every 12 MHz in the DTV frequency band at every rotation angle of 1°.

The thick solid line A is data when the value of D2 is set to 30 mm. Dashed line B is data when the value of D2 is set to 25 mm. The dashed-dotted line C is data when the value of D2 is set to 20 mm. A normal solid line D is a reference value. The reference value is, for example, the average value of the gain [dBi] in the DTV frequency band of 470 to 720 MHz, and is -3 [dBi] in this embodiment. Specifically, in FIG. 4, the position of the bottom line (seventh element 50b3) of the antenna 50 is fixed, the upper bus bar 3 is lowered in the negative Y-axis direction, and the value of D2 is varied to 20 mm, 25 mm, and 30 mm. The gain of the antenna 50 at time is shown. According to the measurement results of FIG. 4, the antenna gain is better when the value of D2 is 25 mm than when it is 20 mm, and when the value of D2 is 30 mm it is even better than when it is 25 mm. That is, it can be confirmed that the gain of the antenna 50 is improved by increasing the distance between the bottom line (seventh element 50b3) of the antenna 50 and the upper bus bar 3 .

This phenomenon is caused by the fact that the closer the hot wire conductor including the upper bus bar 3 is arranged to the antenna 50, the more the directivity of the antenna 50 is directed upward, and the antenna gain in the horizontal plane is lowered. That is, the hot wire conductor including the upper bus bar 3 seems to function as a reflector, and the directivity of the antenna tends to face the direction opposite to the conductor as the conductor is placed closer to the antenna. As described above, there is a trade-off relationship between the improvement of the antenna gain of the antenna 50 and the securing of the wide heating area 2. Therefore, it is necessary to secure a predetermined distance between the antenna 50 and the upper bus bar 3 that is compatible with each other. . In this embodiment, a constant antenna gain can be obtained if the distance D2 between the bottom line (seventh element 50b3) of the antenna 50 and the upper bus bar 3 is 20 mm or more. Moreover, the distance D2 is preferably 25 mm or more, and more preferably 30 mm or more.

In the vehicle glass 100 according to the present embodiment, the horizontally long antenna region 5 is provided in a portion of the upper region 8 along the horizontal direction. The vertical width of the heating region 2 can be increased compared to the case where the is provided. Further, in the vehicle glass 100 according to the present embodiment, D1 is set to 5 mm or more, and D2 is set to 20 mm or more, so that the required antenna gain can be satisfied. Therefore, according to the vehicle glass 100 according to the present embodiment, it is possible to receive radio waves in a predetermined frequency band while suppressing deterioration of the anti-fogging and anti-icing effects of the glass plate 1 .

In vehicle glass 100 according to the present embodiment, distance D3 from upper side portion 201 (upper side portion of opening 210) of vehicle body 200 provided to sandwich antenna 50 from upper bus bar 3 is preferably 80 mm or less. , 75 mm or less, and even more preferably 70 mm or less.

The distance D3 is the portion where the portion of the upper side portion 201 of the vehicle body 200 that faces the upper side portion 51 of the antenna region 5 and the portion of the upper bus bar 3 that faces the lower side portion 52 of the antenna region 5 are closest to each other. It corresponds to the shortest distance connected by a virtual straight line.

According to the vehicle glass 100, by setting the distance D3 to 80 mm or less, the upper region 8 provided with the antenna region 5 is widened as much as possible while suppressing the width of the heating region 2 from being narrowed in the vertical direction. be able to. Therefore, since the degree of freedom of the wiring pattern of the element 50a of the antenna 50 provided in the antenna area 5 can be increased, the visibility of the driver can be ensured while good reception of radio waves in a predetermined frequency band is maintained.

In vehicle glass 100 according to the present embodiment, distance D4 from upper side portion 51 of antenna region 5 to lower side portion 52 of antenna region 5 is preferably 40 mm or less, more preferably 35 mm or less.

According to the vehicle glass 100, by setting D4 to 40 mm or less, the height of the antenna region 5 can be made lower than when D4 exceeds 40 mm. can be widely spread. Therefore, it is possible to further suppress deterioration of the anti-fogging and anti-icing effects of the glass plate 1 while enabling reception of radio waves in a predetermined frequency band. Note that the distance D4 can also be combined with the vehicle glass 100 in which the distance D3 is set to 80 mm or less.

A modification of the vehicle glass 100 shown in FIG. 1 will be described below.

FIG. 5 is a diagram showing a first modification of the vehicle glass 100 according to the embodiment of the present invention. In the vehicle glass 100A of FIG. 5, the upper bus bar 3A has the crank portion 7, and the recessed area 81 is formed in the upper area 8. As shown in FIG. An antenna 50 is provided in the recessed area 81 .

The upper bus bar 3A has a crank portion 7, a first lateral side 71 extending from the crank portion 7 to one side, and a second lateral side 72 extending from the crank portion 7 to the other side.

The crank portion 7 includes a vertical edge 73 , a first bent portion 91 formed at a connecting portion between the first horizontal edge 71 and the vertical edge 73 , and a portion between the second horizontal edge 72 and the vertical edge 73 . It has a second bent portion 92 formed at the connecting portion, and is formed in a crank shape. The crank portion 7 is provided on the left side of the vertical center line 211 . A vertical centerline 211 is an imaginary line that divides the opening 210 into right and left regions equally.

The vertical edge 73 is provided between the first horizontal edge 71 and the second horizontal edge 72 and extends substantially vertically from the first horizontal edge 71 toward the second horizontal edge 72 . The longitudinal edge 73 includes a portion of the first bent portion 91 and a portion of the second bent portion 92 . The first bent portion 91 is a portion including a contact point where the vertical edge side 73 is in contact with the first horizontal edge side 71 and adjacent regions in front of and behind the contact point. The second bent portion 92 is a portion including a contact point where the vertical edge side 73 contacts the second horizontal edge side 72 and adjacent regions in front of and behind the contact point.

The first lateral edge 71 extends in the negative X-axis direction when viewed from the first bent portion 91 , and the second lateral edge 72 extends in the positive X-axis direction when viewed from the second bent portion 92 . The first lateral edge 71 includes a portion of the first curved portion 91 , and the second lateral edge 72 includes a portion of the second curved portion 92 .

The recessed area 81 is a recessed area that is recessed from the upper side portion 201 (the upper side portion of the opening 210) of the vehicle body 200 toward the upper bus bar 3A with the crank portion 7 as a boundary in the entire upper area 8. . A region 82 other than the recessed region is formed in the upper region 8 by forming the recessed region 81 in the upper region 8 . In the drawing, the upper end (in the plus Y-axis direction) of the vertical edge 73 is positioned below (in the minus Y-axis direction) the upper side portion 51 of the antenna area 5 , but is above the upper side portion 51 . (plus Y-axis direction). By positioning the upper end of the vertical edge 73 above the upper edge 51 of the antenna area 5 (in the plus Y-axis direction), the heating area 2 can be further expanded.

According to the vehicle glass 100A, since the antenna 50 is provided in the recessed region 81, the width in the height direction of the region 82 other than the recessed region can be made narrower than the width of the recessed region 81 in the height direction. As a result, the width in the height direction of the heating region 2 connected to the second lateral edge 72 is relatively widened, thereby enabling the reception of radio waves in a predetermined frequency band and preventing the glass plate 1 from fogging and preventing fogging. A decrease in the effect of ice can be further suppressed.

FIG. 6 is a diagram showing a second modification of the vehicle glass 100 according to the embodiment of the invention. The difference from the vehicle glass 100A shown in FIG. 5 is that in the vehicle glass 100B shown in FIG. is to be connected to Further, in the vehicle glass 100B of FIG. 6, the distance D5 from the lower side portion 202 of the vehicle body 200 (the lower side portion of the opening 210) to the first lower bus bar 4A1 in the vertical direction is It is narrower than the distance D6 to the second lower bus bar 4A2.

Distance D5 corresponds to the shortest distance obtained by connecting the portions where lower side portion 202 of vehicle body 200 and first lower bus bar 4A1 are closest to each other with an imaginary straight line. A distance D6 corresponds to the shortest distance obtained by connecting the portions where the lower side portion 202 of the vehicle body 200 and the second lower bus bar 4A2 are closest to each other with an imaginary straight line.

In the vehicle glass 100B, the heating region 2 consists of a heating region 2A and a heating region 2B. The heating region 2A is a region formed by projecting the recessed region 81 of the entire heating region 2 in a substantially vertical direction toward the upper bus bar 3A (first lateral edge 71). That is, the heating region 2A is a region of the entire heating region 2 when the concave region 81 is viewed in a substantially vertical direction toward the upper bus bar 3A. A first lower bus bar 4A1 is connected to the heating region 2A. The second lower busbar 4A2 is connected to the heating area 2B. The heating region 2B is a region obtained by projecting a region 82 other than the concave region in the entire heating region 2 in a substantially vertical direction toward the upper bus bar 3A (second lateral edge 72).

According to the vehicle glass 100B, the distance from the lower side portion 202 of the vehicle body 200 (the lower side portion of the opening 210) to the first lower bus bar 4A1 is longer than the distance from the lower side portion of the opening 210 to the second lower bus bar 4A2. Since it is narrow, the vertical width of the heating region 2A connected to the first lower bus bar 4A1 can be increased. Therefore, the distance between the upper bus bar 3A and the lower bus bar 4A can be kept constant while the reception of radio waves in a predetermined frequency band is possible, and the resistance between the upper bus bar 3A and the lower bus bar 4A can be made substantially uniform. Local heating unevenness due to the heating region 2A can be suppressed.

FIG. 7 is a diagram showing a third modification of the vehicle glass 100 according to the embodiment of the invention. In the vehicle glass 100C of FIG. 7, when the horizontal length of the first lateral edge 71 is D7, D7 is preferably set to 250 mm or more. In addition, D7 is preferably 260 mm or more, more preferably 270 mm or more. On the other hand, if the length of D7 is longer than necessary, the area of the heating regions 2 and 2B on the plus X-axis direction and on the upper side portion 201 side of the crank portion 7 becomes narrower. preferable.

According to the vehicle glass 100C, by setting D7 to be 250 mm or more, the width of the antenna area 5 is wider than when D7 is set to be less than 250 mm. It is possible to increase the degree of freedom of wiring patterns such as the element 50a of the antenna 50 that receives the . Therefore, it is possible to secure the driver's field of view while maintaining good reception of radio waves in a predetermined frequency band. The configuration of the vehicle glass 100C can be combined with the vehicle glasses 100A and 100B described above.

FIG. 8 is a diagram showing a fourth modification of the vehicle glass 100 according to the embodiment of the invention. In the vehicle glass 100D of FIG. 8, when the distance from the conductor in the antenna region 5 to the crank portion 7 is D8, D8 is set to 20 mm or more. The distance from the antenna region 5 to the crank portion 7 is the shortest distance between the conductor and the crank portion 7 in the antenna region 5. In FIG. It corresponds to the shortest distance connected by a straight line.

According to the vehicle glass 100D, by setting D8 to 20 mm or more, compared to the case where D8 is less than 20 mm, the antenna by the crank portion 7 of the upper bus bar 3A provided near the side portion 53 of the antenna area 5 Reduction in gain can be suppressed, and antenna gain can be increased. The influence of the crank portion 7 of the upper bus bar 3A is the leakage of the reception signal of the antenna 50 to the crank portion 7 and the like. The configuration of the vehicle glass 100D can be combined with the vehicle glasses 100B and 100C described above. D8 is preferably 30 mm or more, more preferably 40 mm or more. On the other hand, if the length of D8 is longer than necessary, the region of the heating regions 2 and 2B on the plus X-axis direction and on the upper side portion 201 side of the crank portion 7 becomes narrower. preferable.

FIG. 9 is a diagram showing a fifth modification of the vehicle glass 100 according to the embodiment of the invention. A difference from the vehicle glass 100A of FIG. 5 is that the vehicle glass 100E of FIG.

In FIG. 9, the antenna area 5 is provided in the recessed area 81 on the left side, but the antenna area 5 may be provided in the recessed area 81 on the right side instead of the recessed area 81 on the left side. Each of the areas 81 may be provided with an antenna area 5 and used, for example, as a two-channel DTV diversity antenna system.

In FIG. 9, the upper busbar 3B has two crank portions 7. As shown in FIG. Two recessed areas 81 are formed in the upper area 8 by providing two cranks 7 . The left recessed region 81 is provided near the side portion 203 in the negative X-axis direction of the vehicle body 200 , and the right recessed region 81 is provided near the side portion 203 in the positive X-axis direction of the vehicle body 200 . Both or one of the two recessed areas 81 can be provided with the antenna area 5 .

According to the vehicle glass 100E, the antenna area 5 can be easily secured according to various specifications of the vehicle body 200, for example, when the vehicle body 200 is a right-hand drive vehicle, or when the vehicle body 200 is a left-hand drive vehicle. Also, when constructing a diversity antenna, for example, the antenna regions 5 can be provided in the recessed regions 81 on the driver and front passenger side, respectively, so that the degree of freedom in tuning the antenna pattern increases, and the antenna gain can be further increased. can. The configuration of the vehicle glass 100E can be combined with the vehicle glasses 100C and 100D described above.

FIG. 10 is a diagram showing a sixth modification of the vehicle glass 100 according to the embodiment of the invention. In the vehicle glass 100F of FIG. 10, the glass plate 1 has the camera module mounting portion 9, and the distance from the antenna area 5 to the camera module mounting portion 9 is set to 100 mm or more.

A camera module (not shown) is attached to the camera module attachment portion 9 . The distance from the antenna region 5 to the camera module mounting portion 9 corresponds to, for example, the shortest distance obtained by connecting the portions where the antenna region 5 and the camera module mounting portion 9 are closest to each other with a virtual straight line.

According to the vehicle glass 100F, the distance from the antenna area 5, particularly the antenna element, to the camera module mounting portion 9 is preferably set to 100 mm or more. In this case, compared to the case where the distance from the antenna area 5, particularly the antenna element to the camera module mounting portion 9, is set to less than 100 mm, the separation distance from the camera module can be increased, and noise generated from the camera module can be reduced. The impact is reduced and antenna gain can be increased. The distance from the antenna element to the camera module is preferably 120 mm or longer, more preferably 150 mm or longer.

FIG. 11 is a diagram showing a seventh modification of the vehicle glass 100 according to the embodiment of the invention. In the vehicle glass 100G of FIG. 11, each of the upper busbar 3 and the lower busbar 4 is composed of two split upper busbars 3a and 3b and two split lower busbars 4a and 4b. The heating region 2 is composed of a heating region 2a that is divided into two divided heating regions corresponding to the divided upper busbars 3a and 3b and the divided lower busbars 4a and 4b, respectively. A crank portion 7 is provided on the divided upper bus bar 3a. Each of the plurality of divided upper busbars 3a, 3b and the plurality of divided lower busbars 4a, 4b is a strip electrode extending in the horizontal direction.

According to the vehicle glass 100G, for example, bus bars formed of a conductive material having common dimensions can be used for the divided upper bus bar 3b and the divided lower bus bars 4a and 4b other than the divided upper bus bar 3a. Therefore, the vehicle glass 100G can be manufactured more easily than when the upper busbar 3 and the lower busbar 4 shown in FIG. 5 and the like are used. Further, the lengths of the divided upper busbar 3a and the divided lower busbar 4a, and the lengths of the divided upper busbar 3b and the divided lower busbar 4b are constant, and further, the distance between the divided upper busbar 3a and the divided lower busbar 4a, Since the distance between the divided upper bus bar 3b and the divided lower bus bar 4b is also constant, local uneven heating due to the heating region 2a can be suppressed. The configuration of the vehicle glass 100G can be combined with the vehicle glass 100C to 100F described above.

FIG. 12 is a diagram showing an eighth modification of the vehicle glass 100 according to the embodiment of the invention. In the vehicle glass 100H of FIG. 12, the end 6 of the heating region 2 provided on the left side of the opening 210 and the end 6 of the heating region 2 provided on the right side of the opening 210 are parallel to each other. That is, the end portion 6 of the heating region 2 provided on the left side of the opening 210 and the end portion 6 of the heating region 2 provided on the right side of the opening 210 move downward from the glass plate 1 toward each other. They are placed at a constant distance.

According to the vehicle glass 100H, since the upper busbar 3 and the lower busbar 4 made of a conductive material having the same size can be used, the upper busbar 3 and the lower busbar 4 having different sizes and shapes as shown in FIG. Manufacture of the vehicle glass 100H is facilitated as compared with the case of using it. Further, the lengths of the upper bus bar 3 and the lower bus bar 4 are constant, and the distance between the upper bus bar 3 and the lower bus bar 4 is also constant.

FIG. 13 is a diagram showing a ninth modification of the vehicle glass 100 according to the embodiment of the present invention. The vehicle glass 100I of FIG. 13 is provided with a black ceramic film 11 that hides at least part of the antenna 50 or the antenna region 5 . For the black ceramic film 11, for example, a concealing member for concealing the frame and wiring when fixing the vehicle glass 100I to the vehicle body 200 can be used.

According to the vehicle glass 100I, the black ceramic film 11 hides at least part of the antenna 50 or the antenna region 5 provided in the upper region 8, so that the vehicle glass 100 has anti-fogging and anti-icing effects. In addition, the design of the vehicle glass 100I can be improved. The configuration of the vehicle glass 100I can be combined with the vehicle glass 100C to 100I described above.

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

1 glass plate 2 heating region 2A heating region 2B heating region 2a split heating region 3 upper busbar 3A upper busbar 3B upper busbar 3a split upper busbar 3b split upper busbar 4 lower busbar 4A lower busbar , 4A1 first lower busbar, 4A2 second lower busbar, 4a divided lower busbar, 4b divided lower busbar, 5 antenna region, 6 end portion, 7 crank portion, 8 upper region, 9 camera module mounting portion, 11 black ceramic film, 21 wavy heating wire, 31 electrode, 41 electrode, 50 antenna, 50a element, 50a1 first element, 50a2 second element, 50a3 third element, 50a4 fourth element, 50b element, 50b1 fifth element, 50b2 sixth element, 50b3 7th element 51 upper side 52 lower side 53 side side 61 first power supply section 62 second power supply section 71 first horizontal side 72 second horizontal side 73 vertical side 81 concave region 82 region 91 first bent portion 92 second bent portion 100 vehicle glass 100A vehicle glass 100B vehicle glass 100A vehicle glass 100B vehicle glass 100C vehicle glass 100D vehicle glass, 100E vehicle glass, 100F vehicle glass, 100G vehicle glass, 100H vehicle glass, 100I vehicle glass, 200 vehicle body, 201 upper side, 202 lower side, 203 side side, 210 opening, 211 vertical center line.

Claims (18)

A glass plate provided in the opening of the vehicle body;
an upper bus bar provided on the upper side of the glass plate and extending in a substantially horizontal direction;
a lower bus bar provided on the lower side of the glass plate and extending in a substantially horizontal direction;
a heating region for heating the glass sheet by a voltage applied between the upper busbar and the lower busbar;
an antenna provided in at least a part of an upper region between an upper side portion of the opening and the upper bus bar in the entire region of the glass plate when viewed from above;
has
The antenna has a feeding section and a plurality of elements connected to the feeding section, and is arranged in an antenna region in which the horizontal length of the glass plate is longer than the vertical length when viewed from above,
When the distance from the upper side of the antenna area to the upper side of the opening is D1, and the distance from the lower side of the antenna area to the upper bus bar is D2,
The D1 is 5 mm or more,
The D2 is 20 mm or more ,
The upper bus bar has a crank portion bent in a crank shape,
A recessed region is formed in the upper region, which is a recessed region that is recessed in a direction from the upper side of the opening toward the upper bus bar with the crank as a boundary,
The antenna is provided within the recessed region,
When the shortest distance from the antenna to the crank is D8,
The vehicle glass , wherein the D8 is 20 mm or more . When the distance from the upper side of the opening provided to sandwich the antenna to the upper bus bar is D3,
The vehicle glass according to claim 1, wherein said D3 is 80 mm or less. When the distance from the upper side of the antenna area to the lower side of the antenna area is D4,
The vehicle glass according to claim 1 or 2, wherein said D4 is 40 mm or less. The lower busbar is
a first lower bus bar provided in a region obtained by projecting the concave region in a substantially vertical direction toward the upper bus bar and connected to the heating region;
a second lower bus bar provided in a region formed by projecting a region of the upper region other than the recessed region in a substantially vertical direction toward the upper bus bar and connected to the heating region;
4. The distance from the lower side of the opening to the first lower bus bar in the vertical direction is narrower than the distance from the lower side of the opening to the second lower bus bar in the vertical direction. 10. A vehicle glass according to claim 1. The upper busbar is
a first lateral edge extending to one side of the crank;
a second lateral edge extending to the other side of the crank,
When the horizontal length of the first horizontal edge is D7,
The vehicle glass according to any one of claims 1 to 4 , wherein said D7 is 250 mm or more. The vehicle glass according to any one of claims 1 to 5 , wherein the recessed area is formed in at least one of a left area of the opening and a right area of the opening in the upper area. . Two of the recessed regions are provided separately from each other on the left and right sides of a vertical center line that equally divides the opening into a right region and a left region in the upper region,
7. The vehicle glass of claim 6 , wherein said antenna is provided in each of said two recessed areas. 8. The vehicle glass of claim 7 , wherein the antenna is a diversity antenna. The glass plate has a camera module attachment portion to which a camera module is attached,
The vehicle glass according to any one of claims 1 to 8 , wherein the distance from the element to the camera module mounting portion is 100 mm or more. The vehicle glass according to any one of claims 1 to 9 , wherein the antenna is capable of receiving radio waves in the frequency band of terrestrial digital television broadcasting waves. each of the upper busbar and the lower busbar is composed of two split busbars,
The vehicle glass according to any one of claims 1 to 10 , wherein the heating region is composed of two divided heating regions corresponding to each of the divided bus bars. The vehicle glass according to any one of claims 1 to 11 , wherein the heating region has a plurality of vertically extending wavy heating wires. The vehicle glass according to any one of Claims 1 to 11 , wherein the heating region is a transparent conductive film. The end of the heating region provided on the left side of the opening and the end of the heating region provided on the right side of the opening are parallel to each other, according to any one of claims 1 to 13 . vehicle glass. The vehicle glass according to any one of claims 1 to 14 , wherein the glass plate is a windshield of the vehicle body. The vehicle glass according to any one of claims 1 to 15 , further comprising a black ceramic film provided on said glass plate and covering at least part of said antenna area. A vehicle glass according to any one of claims 1 to 16, wherein the antenna is a dipole antenna having a first feed section and a second feed section. 18. The vehicle glass of claim 17, wherein the antenna has a first element that connects with the first feed and a second element that connects with the second feed.

Images