Vehicular glass

Abstract

A frame member can be fixed to a glass member without inhibiting wiping by a wiper. A vehicular glass comprises: a glass member in which an opening penetrating from a surface on a first direction side to a surface on a second direction side opposite to the first direction is formed; and a far infrared transmission unit disposed inside the opening. The far infrared transmission unit includes: a transmission member that transmits far infrared rays; a frame member that holds the transmission member; and a first adhesive layer that adheres the opening of the glass member and the outer periphery of the frame member and has a thickness of 0.2 mm or more. In the thickness direction of the transmission member, the difference in level between the surface on the first direction side of the transmission member and the surface on the first direction side of the glass member is 1.0 mm or less.

Description

Vehicle glass

[0001] This invention relates to vehicle glass.

[0002] Various sensors may be installed on vehicles such as automobiles to improve their safety. Examples of sensors installed on vehicles include cameras, LiDAR (Light Detection and Ranging), millimeter-wave radar, and infrared sensors.

[0003] Infrared radiation is classified into near-infrared (e.g., wavelengths 0.83 μm to 2 μm), mid-infrared (e.g., wavelengths 3 μm to 5 μm), and far-infrared (e.g., wavelengths 8 μm to 13 μm) based on its wavelength range. Infrared sensors that detect these infrared rays include touch sensors, near-infrared cameras, and LiDAR for the near-infrared, gas analysis and mid-infrared spectroscopy (functional group analysis) for the mid-infrared, and night vision and thermoviewers (hereinafter referred to as far-infrared cameras) for the far-infrared.

[0004] By installing a far-infrared camera inside the vehicle, specifically within the wiper's operating area, the camera is protected by the window glass, and dirt and other contaminants can be wiped away, thus ensuring robustness, water resistance, and dust resistance. However, vehicle windows typically do not transmit far-infrared rays with wavelengths of 8 μm to 13 μm. Therefore, Patent Document 1 discloses a structure in which a through-hole is made in a part of the window glass, and a far-infrared transmitting unit, in which a far-infrared transmitting member is held by a frame member, is placed in the through-hole.

[0005] International Publication No. 2021 / 182290

[0006] To avoid hindering the wiper's wiping action, it is preferable that no steps or uneven surfaces are formed on the exterior surface of the vehicle, or that any such steps or uneven surfaces are kept as small as possible.

[0007] This invention has been made in view of the above problems, and aims to provide a vehicle glass that can fix a frame member to a glass member without hindering wiping by a wiper.

[0008] To solve the above-mentioned problems and achieve the objective, the vehicle glass according to this disclosure comprises a glass member having an opening formed therein that penetrates from the surface on the first direction side to the surface on the second direction side opposite to the first direction, and a far-infrared transmitting unit disposed inside the opening, wherein the far-infrared transmitting unit includes a transmitting member that transmits far-infrared rays, a frame member that holds the transmitting member, and a first adhesive layer with a thickness of 0.2 mm or more that bonds the opening of the glass member to the outer periphery of the frame member, and the step difference between the surface on the first direction side of the transmitting member and the surface on the first direction side of the glass member in the thickness direction of the transmitting member is 1.0 mm or less.

[0009] According to the present invention, the frame member can be fixed to the glass member without hindering wiping by the wiper.

[0010] Figure 1 is a schematic diagram showing the vehicle glass according to the first embodiment mounted on a vehicle. Figure 2 is a schematic plan view of the vehicle glass according to the first embodiment. Figure 3 is a cross-sectional view along line A-A in Figure 2. Figure 4 is a cross-sectional view along line B-B in Figure 2. Figure 5 is a diagram showing an example of a configuration when a far-infrared camera is attached to the vehicle glass. Figure 6 is an enlarged cross-sectional view of the area around the far-infrared transmission region in the vehicle glass. Figure 7 is a plan view and a cross-sectional view of the far-infrared transmission unit. Figure 8 is an enlarged cross-sectional view of the area around the boundary between the transmission member and the frame member. Figure 9 is a schematic diagram showing a coupling model between a silane coupling agent and a transmission member having an inorganic material surface. Figure 10 is a schematic diagram illustrating an example of a method for manufacturing the vehicle glass according to the first embodiment. Figure 11 is a plan view and a cross-sectional view of a modified far-infrared transmission unit. Figure 12A is an enlarged cross-sectional view of the area around the boundary between the transmission member and the frame member in the vehicle glass according to the second embodiment. Figure 12B is an enlarged cross-sectional view of the area around the boundary between the transmission member and the frame member in the vehicle glass according to the second embodiment. Figure 13 is an enlarged cross-sectional view of the area around the boundary between the transparent member and the frame member in the vehicle glass according to the third embodiment. Figure 14 is an enlarged cross-sectional view of the base portion in the vehicle glass according to the fourth embodiment.

[0011] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The present invention is not limited by these embodiments, and if there are multiple embodiments, they may be constructed by combining each embodiment. Numerical values ​​include a range of rounding. When a numerical range is indicated by connecting the upper and lower limits with ~, this range includes the upper and lower limits. That is, for example, "X to Y" means that it is X or greater and Y or less. Also, unless otherwise specified, physical properties and dimensions will be described as values ​​at room temperature, i.e., 5°C or greater and 35°C or less. In addition, in this embodiment, the lower and upper limits can be combined as appropriate. That is, for example, if a lower limit is listed for a certain parameter and an upper limit is listed for that parameter, the parameter may have any value selected from the listed lower limits as the lower limit and any value selected from the listed upper limits as the upper limit.

[0012] (First Embodiment) (Vehicle) Figure 1 is a schematic diagram showing the vehicle glass according to the first embodiment mounted on a vehicle. As shown in Figure 1, the vehicle glass 1 according to the first embodiment is mounted on a vehicle V. The vehicle glass 1 is a window member applied to the windshield of the vehicle V. That is, the vehicle glass 1 is used as the front windshield of the vehicle V, or in other words, as a windshield. Inside the vehicle V, a far-infrared camera CA1 and a visible light camera CA2 are mounted. The inside of the vehicle V refers to, for example, the interior of the vehicle where the driver's seat is located.

[0013] The vehicle glass 1, far-infrared camera CA1, and visible light camera CA2 constitute the camera unit 100. The far-infrared camera CA1 is a camera that detects far-infrared rays. The far-infrared camera CA1 captures a thermal image of the outside of the vehicle V by detecting far-infrared rays from outside the vehicle V. The visible light camera CA2 is a camera that detects visible light. The visible light camera CA2 captures an image of the outside of the vehicle V by detecting visible light from outside the vehicle V. In addition to the far-infrared camera CA1 and the visible light camera CA2, the camera unit 100 may further include, for example, LiDAR (Light Detection and Ranging) or millimeter-wave radar. Here, far-infrared rays refer to, for example, electromagnetic waves in the wavelength band of 8 μm to 13 μm, and visible light refers to, for example, electromagnetic waves in the wavelength band of 380 nm to 830 nm.

[0014] (Vehicle Glass) Figure 2 is a schematic plan view of vehicle glass according to the first embodiment. Figure 3 is a cross-sectional view along line A-A in Figure 2. Figure 4 is a cross-sectional view along line B-B in Figure 2. As shown in Figure 2, the upper edge of the vehicle glass 1 will be referred to as the upper edge portion 1a, the lower edge as the lower edge portion 1b, one side edge as the side edge portion 1c, and the other side edge as the side edge portion 1d. The upper edge portion 1a is the edge portion located on the vertically upper side when the vehicle glass 1 is mounted on the vehicle V. The lower edge portion 1b is the edge portion located on the vertically lower side when the vehicle glass 1 is mounted on the vehicle V. The side edge portion 1c is the edge portion located on one side when the vehicle glass 1 is mounted on the vehicle V. The side edge portion 1d is the edge portion located on the other side when the vehicle glass 1 is mounted on the vehicle V.

[0015] Hereinafter, among the directions parallel to the surface of the vehicle glass 1, the direction from the upper edge 1a to the lower edge 1b will be defined as the Y direction, and the direction from the side edge 1c to the side edge 1d will be defined as the X direction. In the first embodiment, the X direction and the Y direction are orthogonal. The direction perpendicular to the surface of the vehicle glass 1, that is, the thickness direction of the vehicle glass 1, will be defined as the Z direction. Furthermore, one direction along the Z direction will be defined as the Z1 direction (first direction), and the direction opposite to the Z1 direction will be defined as the Z2 direction (second direction). The Z1 direction is, for example, the direction from the inside to the outside of the vehicle V when the vehicle glass 1 is mounted on the vehicle V. The Z2 direction is, for example, the direction from the outside to the inside of the vehicle V when the vehicle glass 1 is mounted on the vehicle V. The X direction and the Y direction are along the surface of the vehicle glass 1, but for example, if the surface of the vehicle glass 1 is curved, they may be directions that are tangent to the surface of the vehicle glass 1 at the center point O of the vehicle glass 1. The center point O is the central position of the vehicle glass 1 when viewed from the Z direction.

[0016] The vehicle glass 1 has a light-transmitting region A1 and a light-blocking region A2. The light-transmitting region A1 is the central part of the vehicle glass 1 when viewed from the Z direction. The light-transmitting region A1 is the region that ensures the driver's field of view. The light-transmitting region A1 is the region that transmits visible light. The light-blocking region A2 is the region that is formed around the light-transmitting region A1 when viewed from the Z direction. The light-blocking region A2 is the region that blocks visible light and ultraviolet light. Within the light-blocking region A2a, which is the part on the upper edge 1a side of the light-blocking region A2, a far-infrared transmitting region B and a visible light transmitting region C are formed.

[0017] The far-infrared transmission region B is a region that transmits far-infrared rays and is the region in which the far-infrared camera CA1 is installed. That is, the far-infrared camera CA1 is installed in a position that overlaps with the far-infrared transmission region B when viewed from the optical axis direction of the far-infrared camera CA1. The visible light transmission region C is a region that transmits visible light and is the region in which the visible light camera CA2 is installed. That is, the visible light camera CA2 is installed in a position that overlaps with the visible light transmission region C when viewed from the optical axis direction of the visible light camera CA2. Thus, in this embodiment, the far-infrared transmission region B (the opening 19 described later) is formed within the light-shielding region A2a, which is the part of the light-shielding region A2 that is on the upper edge 1a side of the center point O (for example, in the vicinity of the upper edge 1a). However, the far-infrared transmission region B (the opening 19 described later) is not limited to being formed within the light-shielding region A2a, but may be formed in any region on the surface of the glass member 10. For example, the far-infrared transmission region B (the opening 19 described later) may be formed at a position closer to the lower edge 1b than the center point O of the glass member 10 (for example, in the vicinity of the lower edge 1b). The same applies to the visible light transmission region C.

[0018] As described above, the light-shielding region A2 has a far-infrared transmitting region B and a visible light transmitting region C. Therefore, the light-shielding region A2 blocks far-infrared rays in areas other than where the far-infrared transmitting region B is formed, and blocks visible light in areas other than where the visible light transmitting region C is formed. The far-infrared transmitting region B and the visible light transmitting region C are surrounded by a light-shielding region A2a. This surrounding light-shielding region A2a is preferable because it protects the various sensors from sunlight. It is also preferable from a design standpoint because the wiring of the various sensors is not visible from outside the vehicle. A detailed explanation of the far-infrared transmitting region B and the visible light transmitting region C will be given later.

[0019] As shown in Figure 3, the vehicle glass 1 comprises a glass member 10. The glass member 10 is the main body portion of the vehicle glass 1 that constitutes the windshield of the vehicle V. The glass member 10 may be single-pane glass or laminated glass, but in the first embodiment, the glass member 10 is made of laminated glass. Specifically, the glass member 10 comprises a glass substrate 12, a glass substrate 14, an intermediate layer 16, and a light-shielding layer 18. In the vehicle glass 1, the glass substrate 12, the intermediate layer 16, the glass substrate 14, and the light-shielding layer 18 are laminated in this order in the Z2 direction. The glass substrate 12 and the glass substrate 14 are fixed (bonded) to each other via the intermediate layer 16.

[0020] The glass substrates 12 and 14 may be inorganic glass or organic glass. As inorganic glass, for example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc., can be used without particular limitation. Among these, soda-lime glass is particularly preferred in terms of manufacturing cost and moldability. For example, in the case of inorganic glass, glass plates formed by the float method or the like are preferred. When glass substrates 12 and 14 are inorganic glass, glass substrates 12 and 14 may be either untempered glass or tempered glass. Tempered glass may be either physically tempered glass or chemically tempered glass. Untempered glass is made by forming molten glass into a plate and slowly cooling it. Tempered glass is made by forming a compressive stress layer on the surface of untempered glass. Tempered glass may be either physically tempered glass or chemically tempered glass. In the case of physically strengthened glass, the glass surface may be strengthened by creating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the inside of the glass, through operations other than slow cooling, such as air-cooled strengthening, where a uniformly heated glass plate is rapidly cooled from a temperature near its softening point during bending. In the case of chemically strengthened glass, the glass surface may be strengthened after bending by creating compressive stress on the glass surface by methods such as ion exchange. Known molding techniques such as gravity molding, press molding, and roller molding may be used for bending the glass substrate. Glass that absorbs ultraviolet or infrared rays may also be used. Furthermore, the glass substrate 12 and the glass substrate 14 may be transparent or colored. The thickness of the glass substrate 12 and the glass substrate 14 is not particularly limited, but is preferably 0.3 mm or more, more preferably 0.5 mm or more, even more preferably 1 mm or more, even more preferably 1.5 mm or more, and most preferably 2 mm or more. Furthermore, the thickness of the glass substrate 12 and the glass substrate 14 is preferably 5 mm or less, more preferably 4 mm or less, and even more preferably 3 mm or less. The intermediate layer 16 is an adhesive layer that bonds the glass substrate 12 and the glass substrate 14 together.As the intermediate layer 16, known materials such as polyvinyl butyral (hereinafter also referred to as PVB) modified material, ethylene-vinyl acetate copolymer (EVA) material, urethane resin material, and vinyl chloride resin material can be used. The intermediate layer 16 may also contain functional particles such as ultraviolet absorbers, infrared absorbers, adhesion enhancers, antioxidants, and light stabilizers. The intermediate layer 16 may be transparent or colored. The intermediate layer 16 may also have a multilayer structure of two or more layers. More specifically, the glass substrate 12 includes one surface 12A (the surface on the Z1 direction) and the other surface 12B (the surface on the Z2 direction), and the other surface 12B is in contact with one surface 16A (the surface on the Z1 direction) of the intermediate layer 16 and is fixed (adhered) to the intermediate layer 16. The glass substrate 14 includes one surface 14A (the surface facing the Z1 direction) and the other surface 14B (the surface facing the Z2 direction), and the one surface 14A is in contact with the other surface 16B (the surface facing the Z2 direction) of the intermediate layer 16 and is fixed (bonded) to the intermediate layer 16. In this way, the vehicle glass 1 is a laminated glass in which the glass substrate 12 and the glass substrate 14 are laminated together. However, the vehicle glass 1 is not limited to laminated glass, and may be a configuration that includes only one of the glass substrate 12 and the glass substrate 14 (i.e., a single-pane glass). In this case, the intermediate layer 16 may not be provided. The intermediate layer 16 may contain a heat-generating film (PET substrate), a heating device, an antenna, a liquid crystal device, a dimming device, an image projection layer, an emitting layer, a heat-reflective layer, etc. Hereinafter, when the glass substrates 12 and 14 are not distinguished, they will be referred to as the glass substrate. When the vehicle glass 1 is installed in a vehicle, the vehicle glass 1 may have a curved shape that protrudes outwards from the vehicle. The curved shape of the vehicle glass 1 from the periphery to the center may be a curved shape in only one direction, a curved shape in two perpendicular directions, or a curved shape in three or more directions. The thickness of the vehicle glass 1 is not particularly limited, but is preferably 3 mm or more, more preferably 4 mm or more, even more preferably 4.5 mm or more, even more preferably 5 mm or more, and most preferably 6 mm or more.Furthermore, the thickness of the vehicle glass 1 is preferably 10 mm or less, more preferably 9 mm or less, even more preferably 8 mm or less, and most preferably 7 mm or less. In this embodiment, the upper and lower limits can be combined as appropriate. Also, if the vehicle glass 1 is laminated glass, the above thickness may be read as the total thickness of the laminated glass.

[0021] The light-shielding layer 18 is a layer that blocks visible light. The light-shielding layer 18 may be provided in a strip shape along the periphery of the vehicle glass 1. This suppresses the deterioration of aesthetics due to refraction of the glass substrates 12 and 14. As the light-shielding layer 18, for example, a ceramic light-shielding layer or a light-shielding film can be used. As the ceramic light-shielding layer, for example, a ceramic layer made of conventionally known materials such as a black ceramic layer can be used. As the light-shielding film, for example, a light-shielding polyethylene terephthalate (PET) film, a light-shielding polyethylene naphthalate (PEN) film, a light-shielding polymethyl methacrylate (PMMA) film, etc. can be used. The light-shielding layer 18 includes one surface 18A (the surface on the Z1 direction side) and the other surface 18B (the surface on the Z2 direction side). In the example of Figure 3, one surface 18A is in contact with and fixed to the other surface 14B of the glass substrate 14, but it is not limited to this. For example, the light-shielding layer 18 may be provided on the surface 12B of the glass substrate 12. In this case, the light-shielding layer 18 does not need to be provided on the glass substrate 14. In other words, the light-shielding layer 18 may be provided on the surface 14B of the glass substrate 14, on the surface 12B of the glass substrate 12, or on both the surface 14B and the surface 12B.

[0022] In the first embodiment, the side of the vehicle glass 1 on which the light-shielding layer 18 is provided is the interior side (Z2 direction side), and the glass substrate 12 is the exterior side (Z1 direction side). However, it is not limited to this, and the light-shielding layer 18 may be provided on the exterior side of the vehicle V. If the vehicle glass 1 is made of laminated glass of glass substrates 12 and 14, the light-shielding layer 18 may be formed between the glass substrate 12 and the glass substrate 14. That is, the light-shielding layer 18 may be formed on, for example, the surface 12B or the surface 14A, or a part of the intermediate layer 16 may be the light-shielding layer 18. If a part of the intermediate layer 16 is the light-shielding layer 18, a part of the intermediate layer 16 may be colored with a dark pigment, or a layer containing a dark pigment may be provided in a part of the intermediate layer 16.

[0023] The light-shielding region A2 is formed by providing a light-shielding layer 18 on the glass member 10. In other words, the light-shielding region A2 is the region in which the glass member 10 is equipped with a light-shielding layer 18. Specifically, the light-shielding region A2 is the region in which the glass substrate 12, the intermediate layer 16, the glass substrate 14, and the light-shielding layer 18 are laminated. On the other hand, the light-transmitting region A1 is the region in which the glass member 10 is not equipped with a light-shielding layer 18. Specifically, the light-transmitting region A1 is the region in which the glass substrate 12, the intermediate layer 16, and the glass substrate 14 are laminated, but the light-shielding layer 18 is not laminated.

[0024] As shown in Figure 4, the visible light transmission region C, like the light-transmitting region A1, is a region in the Z direction where the glass member 10 does not have a light-shielding layer 18. That is, the visible light transmission region C is a region where the glass substrate 12, the intermediate layer 16, and the glass substrate 14 are laminated, and the light-shielding layer 18 is not laminated.

[0025] (Far-infrared ray transmission unit) As shown in FIG. 3, the glass member 10 has an opening 19 penetrating from the inner surface on the vehicle interior side (the surface 18B on the Z2 direction side) to the outer surface on the vehicle exterior side (the surface 12A on the Z1 direction side). A far-infrared ray transmission unit U is provided in the opening 19. The region where the opening 19 is formed and the far-infrared ray transmission unit U is provided is the far-infrared ray transmission region B. The light-shielding layer 18 is not provided in the far-infrared ray transmission region B. That is, in the far-infrared ray transmission region B, the glass substrate 12, the intermediate layer 16, the glass substrate 14, and the light-shielding layer 18 are not provided, and the far-infrared ray transmission unit U is provided in the formed opening 19.

[0026] The far-infrared ray transmission unit U includes a transmission member 20 and a frame member 30 provided at the peripheral edge of the transmission member 20. In the following description, the direction toward the geometric center when the transmission member 20 is viewed from the Z direction may be described as the radially inner side, and the direction away from the geometric center may be described as the radially outer side.

[0027] (Transmission member) The transmission member 20 is disposed inside the opening 19 and transmits far-infrared rays. The average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm of the transmission member 20 is higher than that of the glass member 10. The average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm of the transmission member 20 is higher than that of the frame member 30. The average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm of the transmission member 20 is preferably 25% or more, more preferably 40% or more, further preferably 50% or more, further preferably 70% or more, and particularly preferably 85% or more. Also, the average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm of the transmission member 20 is preferably 100% or less. In order to make the average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm 85% or more, it is preferable to provide an antireflection film. By the average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm being within this numerical range, far-infrared rays can be appropriately transmitted and the performance of the far-infrared camera CA1 can be sufficiently exhibited. The transmittance of far-infrared rays can be measured, for example, by a Fourier transform infrared spectrometer (manufactured by Thermo Scientific, product name: Nicolet iS10).

[0028] The material of the transmission member 20 is not particularly limited, and examples thereof include ZnS, Ge, Si, chalcogenide glass, and the like. A preferable composition of the chalcogenide glass is, in atomic percentage, Ge + Ga: 7% to 25%, Sb: 0% to 35%, Bi: 0% to 20%, Zn: 0% to 20%, Sn: 0% to 20%, Si: 0% to 20%, La: 0% to 20%, S + Se + Te: 55% to 80%, Ti: 0.005% to 0.3%, Li + Na + K + Cs: 0% to 20%, F + Cl + Br + I: 0% to 20%. And this glass preferably has a glass transition point (Tg) of 140°C to 550°C. The transmission member 20 more preferably has at least one of Si and Ge as a main component. Here, the main component may refer to a content rate of 50% by mass or more with respect to the whole transmission member 20.

[0029] The transmission member 20 has a surface 20A on the vehicle outer side (Z1 direction side), a surface 20B on the vehicle inner side (Z2 direction side), and an outer peripheral end face 21. The transmission member 20 may be coated with a functional film on the surface 20A or the surface 20B. For example, an antireflection film may be provided as a functional film on the surface 20A. As the antireflection film, an antireflection film of 3 to 12 layers is preferable, and the material is not particularly limited, and examples thereof include Ge, Si, ZnS, ZnSe, As ｘ , ｘ , ｘ , <0ooo008>, ｘ , ｘ , ｙ , ｙ , <00000l7>, ｘ , ｙ , ｙ , ｘ , ｘ , ｘ , ｙ , ｘ , ｘ , ｘ , ｘ ,

[0029] , ｘ , S ｙ 、As ｘ Se ｙ 、metal oxides (Al ｘ O ｙ 、Bi [[ID=I6]] ｘ O ｙ 、CeO ｘ 、CuO、HfO ｘ 、MgO、SiO、SiO ｘ 、NiO、TiO、TiO ｘ 、Ti ｘ O ｙ 、Y ｘ O ｙ 、ZrO ｘ ), hydrogenated carbon, diamond-like carbon (DLC), metal fluoride (MgF ｘ 、CaF ｘ 、SrF ｘ 、BaF ｘ 、PbFｘ , LaF ｘ , YF ｘ )) is preferred (x and y are any positive numbers). From the viewpoint of scratch resistance, the layer on the Z1 direction side of the outermost layer of the antireflection film is preferably a film having a Mohs hardness of 7 or more and a high transmittance of far infrared rays. The layer on the Z1 direction side of the outermost layer of the antireflection film is particularly preferably a ZrO ｘ film.

[0030] In the first embodiment, it is preferable that an inorganic material is provided on the outermost layers of the surface 20A and the surface 20B of the transmissive member 20. The outermost layers of the surface 20A and the surface 20B are the outermost layers of the functional layer when the transmissive member 20 includes a functional layer (coating) on the surface of the substrate. The outermost layer of the functional layer preferably contains ZrO ２ . The content of ZrO ２ is preferably 30% by mass or more and 80% by mass or less with respect to the entire outermost layer. When the content of ZrO ２ in the outermost layer is within this range, far infrared rays can be appropriately transmitted and the scratch resistance can be improved. In addition to ZrO ２ , the outermost layer of the functional layer preferably contains B ２ O ５ . The content of B ２ O ５ is preferably 20% by mass or more and 70% by mass or less with respect to the entire outermost layer. When the content of B ２ O ５ in the outermost layer is within this range, far infrared rays can be appropriately transmitted and the visible light reflectance can be reduced. B ２ O ５The visible light reflectance of the transparent member 20 can be adjusted according to the content of SiO2, so that the visible light reflectance of the transparent member 20 and the visible light reflectance of the light-shielding region A2 can be brought closer together. In the first embodiment, it is preferable that the difference between the visible light reflectance of the transparent member 20 and the visible light reflectance of the light-shielding region A2 (light-shielding region A2a) is within 5%. This reduces the visual difference between the light-shielding region A2a and the far-infrared transmitting region B, thereby improving the design. The outermost layer of surfaces 20A and 20B is the surface of the substrate if the transparent member 20 does not include a functional layer (coating) on ​​the surface of the substrate. The surface of the substrate may be composed of a natural oxide film. For example, if the transparent member 20 is composed of Si as the substrate, the outermost layer of surfaces 20A and 20B is SiO2 ２ It may be an oxide film like the one shown.

[0031] The shape of the transparent member 20 is not particularly limited, but it is preferably a plate-like shape that matches the shape of the opening 19. That is, for example, if the opening 19 is circular, it is preferable that the transparent member 20 be disc-shaped (cylindrical). Also, from the viewpoint of design, the surface shape of the transparent member 20 on the Z1 direction side may be processed to match the curvature of the outer surface shape of the glass substrate 12. Furthermore, the transparent member 20 may be lens-shaped in order to achieve both a wider field of view of the far-infrared camera CA1 and improved mechanical properties. Such a configuration is preferable because it allows for efficient collection of far-infrared rays even with a small area of ​​the transparent member 20. In this case, the number of lens-shaped transparent members 20 is preferably one to three, and typically one is preferred. Furthermore, it is particularly preferable that the lens-shaped transparent member 20 is pre-aligned and modularized, and integrated with a housing or bracket 40 for bonding the far-infrared camera CA1 to the vehicle glass 1.

[0032] In the vehicle glass 1 of the first embodiment, the opening 19 on the Z2-direction side surface (surface 18B) has the same configuration as the opening 19 on the Z1-direction side surface (surface 12A), and it is preferable that the shape of the transparent member 20 is also the same as the area on the Z2-direction side surface and the Z1-direction side surface. In other words, there is no step on the inner wall of the opening 19, and the inner wall of the opening 19 extends along the thickness direction of the vehicle glass 1. By adopting such a configuration, the manufacturing of the glass member 10 and the transparent member 20 becomes easier. Furthermore, if the glass member 10 is laminated glass comprising a glass substrate 12 (Z1-direction side) and a glass substrate 14 (Z2-direction side), the opening 19 is formed by the overlapping of the opening 12a of the glass substrate 12 and the opening 14a of the glass substrate 14. In this case, the opening 12a of the glass substrate 12 should overlap with the opening 14a of the glass substrate 14, and a transparent member 20 sized to fit the opening 12a of the glass substrate 12 should be placed inside the opening 12a of the glass substrate 12.

[0033] From the viewpoint of strength, the thickness of the permeable member 20 is preferably 1.0 mm or more, more preferably 1.5 mm or more, and even more preferably 2.0 mm or more. The upper limit of the thickness of the permeable member 20 is not particularly limited, but is usually 5.0 mm or less. Here, thickness refers to the length of the permeable member 20 in the Z direction.

[0034] (Frame Member) The frame member 30 is positioned between the inner circumferential surface of the opening 19 of the glass member 10 and the transparent member 20. The frame member 30 holds the outer periphery of the transparent member 20 and is attached to the opening 19. The shape of the frame member 30 is not particularly limited, but if the transparent member 20 is disc-shaped, it is formed in a cylindrical shape and positioned on the periphery of the transparent member 20. The frame member 30 has a holding portion 31 positioned between the transparent member 20 and the glass member 10, and a fixing portion 32 formed on the Z2 direction side relative to the holding portion 31. The holding portion 31 is interposed between the transparent member 20 and the glass member 10. The frame member 30 may be composed of a single member or of multiple members. A frame member 30 composed of multiple members may, for example, include a first member including the holding portion 31 and a second member including the fixing portion 32. A frame member 30 composed of multiple members may, for example, be composed of a first member on the Z1 direction side and a second member on the Z2 direction side. The frame member 30 may be composed of three or more members. In the first embodiment, the frame member 30 is composed of a single member including a holding portion 31 and a fixing portion 32.

[0035] The holding portion 31 is formed in a cylindrical shape that surrounds the peripheral edge of the transparent member 20. The outer circumferential surface of the holding portion 31 faces the inner circumferential surface of the opening 19 of the glass member 10. The inner circumferential surface of the holding portion 31 faces the outer circumferential end surface 21 of the transparent member 20. The length of the holding portion 31 in the Z direction is greater than or equal to the total thickness of the glass member 10. The surface of the holding portion 31 in the Z1 direction is exposed to the outside of the vehicle within the opening 19. The end of the holding portion 31 in the Z2 direction is connected to the fixing portion 32.

[0036] The fixing portion 32 extends radially outward from the Z2 end of the holding portion 31. The fixing portion 32 is provided around the entire circumference of the outer surface of the holding portion 31 and is ring-shaped (flange-shaped). The fixing portion 32 extends radially outward from the outer surface of the holding portion 31 beyond the inner surface of the opening 19 of the glass member 10. In other words, the outer dimensions of the fixing portion 32 are larger than the opening 19. When the frame member 30 is attached to the glass member 10, the fixing portion 32 is positioned on the Z2 side with respect to the Z2 direction (inside the vehicle) surface of the glass member 10 (surface 18B of the light-shielding layer 18) and faces the surface 18B in the Z direction. An adhesive layer (first adhesive layer) 50 is provided between the fixing portion 32 and the surface 18B. The frame member 30 is attached to the opening 19 of the glass member 10 by the first adhesive layer 50 at the fixing portion 32. Furthermore, the first adhesive layer 50 is formed in a ring shape around the entire circumference of the fixing portion 32. This ensures watertightness between the inner surface of the opening 19 and the frame member 30.

[0037] The constituent material of the frame member 30 is not particularly limited. At least a portion of the frame member 30 may be made of resins such as ABS (Acrylonitrile butadiene styrene) resin, AES (Acrylonitrile ethylene styrene) resin, rigid polyvinyl chloride (rigid PVC), polystyrene (PS), polyamide (PA), polycarbonate (PC), polyphenylene sulfide (PPS), and polytetrafluoroethylene (PTFE). When the frame member 30 is made of a thermoplastic resin such as ABS, AES, or rigid polyvinyl chloride, a molding method such as injection molding can be applied. At least a portion of the frame member 30 may be formed from an elastomer such as ethylene propylene monomer (EPDM), flexible polyvinyl chloride (flexible PVC), thermoplastic polyvinyl elastomer (TPVC), thermoplastic polyethylene elastomer (TPE), thermoplastic polyamide elastomer (TPAE), fluorinated ethylene propylene (FEP), vinylidene fluoride fluororubber (FKM), tetrafluoroethylene-purple vinyl ether fluororubber (FFKM), or silicone rubber. Here, FKM and FFKM are elastomers defined in ASTM:D1418. By using an elastomer as a constituent material of the frame member 30, the watertightness between the glass member 10 and the permeable member 20 can be improved.Furthermore, at least a portion of the frame member 30 may be formed from a fluororesin such as ETFE (Ethylene tetrafluoroethylene) or PFA (Perfluoroalkoxy alkanes). ETFE is a copolymer having units derived from ethylene and units derived from tetrafluoroethylene. ETFE may further contain units derived from a monomer having adhesive functional groups as a third component. PFA is a copolymer having units derived from tetrafluoroethylene and units derived from perfluoro(alkyl vinyl ether). PFA may further contain units derived from a monomer having adhesive functional groups as a third component. ETFE and PFA are preferred as constituent materials for the frame member 30 due to their excellent moldability, and the adhesion is further improved by including an adhesive third component. As the monomer having adhesive functional groups, monomers having carboxyl groups, acid anhydride groups, or carboxylic acid halide groups are preferred, and unsaturated dicarboxylic acid anhydrides are more preferred. Examples of unsaturated dicarboxylic acid anhydrides include itaconic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic acid anhydride (Hymic anhydride), and maleic anhydride. Monomers having adhesive functional groups may have one adhesive functional group alone or two or more. ETFE may optionally have units derived from ethylene, TFE, and other monomers other than monomers having adhesive functional groups. Examples of other monomers include fluoroolefins (excluding tetrafluoroethylene) and fluoro(alkyl vinyl ethers). PFA may optionally have units derived from TFE, perfluoro(alkyl vinyl ethers), and other monomers other than monomers having adhesive functional groups. Examples of other monomers include fluoroolefins (excluding tetrafluoroethylene). Furthermore, the frame member 30 is preferably black. This improves aesthetics.

[0038] The first adhesive layer 50 adheres the frame member 30 and the glass member 10. The first adhesive layer 50 will be described later.

[0039] (Far-infrared transmission region) Next, the far-infrared transmission region B will be described. As shown in Figure 2, the far-infrared transmission region B is formed near the upper edge 1a of the vehicle glass 1 in the Y direction and near the center of the vehicle glass 1 in the X direction. The opening 19 and the transmission member 20 are formed near the upper edge 1a of the vehicle glass 1 in the Y direction and near the center of the vehicle glass 1 in the X direction.

[0040] As shown in Figure 3, the transmissive member 20 of the far-infrared transmission region B has a length DA of the longest straight line connecting any two points in the plane on the Z1 side that is 80 mm or less. The length DA is preferably 70 mm or less, more preferably 65 mm or less, and even more preferably 50 mm or less. The length DA is preferably 25 mm or more, more preferably 30 mm or more, and even more preferably 35 mm or more. The opening 19 of the far-infrared transmission region B preferably has a length DB of the longest straight line connecting any two points in the plane on the Z1 side that is 84 mm or less. The length DB is more preferably 74 mm or less, even more preferably 69 mm or less, and even more preferably 54 mm or less. The length DB is preferably 29 mm or more, more preferably 34 mm or more, and even more preferably 39 mm or more. By setting the length DA of the transparent member 20 and the length DB of the opening 19 within this range, it is possible to maintain the image quality of the far-infrared camera CA1 while suppressing a decrease in the strength of the vehicle glass 1 and suppressing the amount of transparency distortion around the opening 19. Furthermore, considering the expansion of each material within the operating temperature range, appropriate lengths DA and DB are determined so that distortion does not occur. In addition, a gap may be provided in advance as a countermeasure against distortion due to expansion. If the shape of the Z1-side surface of the transparent member 20 is circular, lengths DA and DB correspond to the diameter of the Z1-side surface. Here, lengths DA and DB refer to the lengths of the vehicle glass 1 when it is mounted on the vehicle V. For example, if the glass is bent to form the shape for mounting on the vehicle V, lengths DA and DB will be the lengths after bending. The same applies to the explanation of dimensions and positions other than lengths DA and DB unless otherwise specified.

[0041] (Visible Light Transmission Region) Next, the visible light transmission region C will be described. As shown in Figure 2, it is preferable that the visible light transmission region C be located near the far-infrared transmission region B. Specifically, the center of the far-infrared transmission region B as viewed from the Z direction is defined as the center point OB, and the center of the visible light transmission region C as viewed from the Z direction is defined as the center point OC. If the shortest distance between the far-infrared transmission region B (aperture 19) and the visible light transmission region C as viewed from the Z direction is defined as distance L, then it is preferable that distance L is greater than 0 mm and 100 mm or less, and more preferably 10 mm or more and 80 mm or less. By positioning the visible light transmission region C within this range relative to the far-infrared transmission region B, it is possible to capture images at close range with the far-infrared camera CA1 and the visible light camera CA2, while suppressing the amount of transmission distortion in the visible light transmission region C, and enabling the visible light camera CA2 to capture images appropriately. By capturing images of nearby locations with the far-infrared camera CA1 and the visible-light camera CA2, the processing load on the data obtained from each camera is reduced, and the routing of power and signal cables is also optimized.

[0042] It is preferable that the visible light transmission region C and the far-infrared transmission region B are located side by side in the X direction. That is, it is preferable that the visible light transmission region C is not located on the Y-direction side of the far-infrared transmission region B, but is aligned with the far-infrared transmission region B in the X direction. By arranging the visible light transmission region C side by side with the far-infrared transmission region B in the X direction, the visible light transmission region C can be positioned near the upper edge 1a. Therefore, the driver's field of view in the light-transmitting region A1 can be appropriately secured.

[0043] Preferably, the visible light transmission region C is located near the upper edge 1a in the Y direction and near the far infrared transmission region B in the X direction, similar to the far infrared transmission region B. By positioning the visible light transmission region C in this location, it is possible to capture images of close positions with the far infrared camera CA1 and the visible light camera CA2, while suppressing the amount of transmission distortion in the visible light transmission region C, allowing the visible light camera CA2 to capture images appropriately.

[0044] (Camera Unit Configuration) Next, the configuration of the camera unit 100 of the first embodiment, more specifically, an example of the configuration when the far-infrared camera CA1 is attached to the vehicle glass 1 will be described. Figure 5 is a diagram showing an example of the configuration when the far-infrared camera is attached to the vehicle glass.

[0045] The far-infrared camera CA1 is mounted on the vehicle glass 1 so as to capture an external thermal image through the far-infrared transmission region B of the vehicle glass 1. The far-infrared camera CA1 is installed inside the vehicle V (inside the vehicle) at a position facing the far-infrared transmission region B. The type of far-infrared camera CA1 is not particularly limited, and any known far-infrared camera can be used. As shown in Figure 5, the far-infrared camera CA1 is mounted on the vehicle glass 1 by, for example, a bracket 40. The far-infrared camera CA1 is usually mounted so that the optical axis LX is approximately horizontal.

[0046] The visible light camera CA2 is mounted on the vehicle glass 1 so that it can capture images of the outside through the visible light transmission area C of the vehicle glass 1. The visible light camera CA2 is installed inside the vehicle V (inside the vehicle) at a position facing the visible light transmission area C. It is preferable that the visible light camera CA2 is mounted so that the optical axis LX of the far infrared camera CA1 and the optical axis of the visible light camera CA2 are approximately parallel. Approximately parallel is a concept that includes not only cases where these optical axes are perfectly parallel, but also cases where they are slightly deviated from parallel by an error margin. By doing so, the optical axis LX of the far infrared camera CA1 and the center of the field of view of the visible light camera CA2 almost coincide, which is preferable when combining images obtained from these cameras for information processing.

[0047] (Details of the Far-Infrared Transmission Unit) Next, the details of the far-infrared transmission unit U will be described. Figure 6 is an enlarged cross-sectional view of the area around the far-infrared transmission region in vehicle glass. Figure 7 is a plan view and a cross-sectional view of the far-infrared transmission unit. Figure 8 is an enlarged cross-sectional view of the area around the boundary between the transmission member and the frame member.

[0048] In the far-infrared unit U, the frame member 30 is bonded to the glass member 10 with a first adhesive layer 50. The first adhesive layer 50 bonds the frame member 30 and the glass member 10. As shown in Figure 8, the thickness ta of the first adhesive layer 50 is 0.2 mm or more. By making the thickness ta of the first adhesive layer 50 (length in the direction in which the opening 19 opens, length in the thickness direction of the glass member 10) 0.2 mm or more, manufacturing errors etc. can be absorbed by the first adhesive layer 50, and the step difference between the glass member 10 and the frame member 30 can be reduced. The thickness ta of the first adhesive layer 50 is preferably 0.4 mm or more, more preferably 0.8 mm or more, more preferably 1.2 mm or more, more preferably 1.6 mm or more, and even more preferably 2 mm or more. Furthermore, the thickness ta of the first adhesive layer 50 is preferably 10 mm or less, more preferably 8 mm or less, more preferably 6 mm or less, and even more preferably 4 mm or less. In the first embodiment, the upper and lower numerical values ​​can be combined as appropriate. Also, as shown in Figure 7, the first adhesive layer 50 is positioned on the surface where the fixing portion 32, which is provided around the entire outer circumference of the frame member 30, and the glass member 10 face each other. The first adhesive layer 50 is positioned over the entire outer circumference of the frame member 30 and seals the space between the glass member 10 and the frame member 30.

[0049] As shown in Figure 8, the width tc (radial length) of the first adhesive layer 50 is preferably 0.1 mm or more, more preferably 1 mm or more, and even more preferably 3 mm or more. Furthermore, the width tc of the first adhesive layer 50 is preferably 100 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. By setting the width tc within this range, the glass member 10 and the frame member 30 can be properly joined. Note that the width tc of the first adhesive layer 50 refers to the radial length from the radially innermost part of the first adhesive layer 50 to the radially outermost part. As in the modified example described later, if the first adhesive layer 50 is composed of multiple adhesive layers of different materials, the individual widths of those adhesive layers can be said to be the width tc.

[0050] The first adhesive layer 50 includes a portion formed of an adhesive such as a urethane adhesive, a modified silicone adhesive, an acrylic adhesive, an epoxy adhesive, a phenolic adhesive, an epoxy-modified silicone adhesive, a polyamide adhesive, a polyester adhesive, or a polyurethane adhesive, or an adhesive having properties such as thermosetting, moisture curing, two-component curing, ultraviolet curing, visible light curing, anaerobic curing, or thermoplasticity. It is preferable to use a urethane adhesive or an epoxy-modified silicone adhesive (a two-component epoxy-modified silicone adhesive) for the first adhesive layer 50. This improves load-bearing capacity, heat resistance, and cold resistance, and improves adhesive strength and shear strength. As used herein, unless otherwise specified, "adhesive" refers to a cured adhesive, and the same applies hereafter.

[0051] In particular, when the first adhesive layer 50 is composed of one type of material (one type of adhesive), it is especially preferable to use an epoxy-modified silicone adhesive as the first adhesive layer 50. This improves load-bearing capacity, heat resistance, and cold resistance, and improves adhesive strength and shear strength. Furthermore, this shortens the time required to place the vehicle glass 1 in the processing position for fixing during manufacturing. For example, the vehicle glass 1 is stored with the uncured adhesive constituting the first adhesive layer 50 applied between the frame member 30 to which the transparent member 20 is attached and the glass member 10, until the adhesive hardens. Therefore, if the time until the adhesive hardens is long, there is a risk that the relative position of the frame member 30 (transparent member 20) with respect to the glass member 10 may shift due to gravity or other factors. In particular, if the vehicle glass 1 is stored in an upright position (with the end face of the vehicle glass 1 facing the installation surface), there is a risk that the frame member 30 (transparent member 20) and the opening 19 of the glass member 10 may become misaligned due to their own weight. In contrast, by using an epoxy-modified silicone adhesive as the first adhesive layer 50, the curing time (hardening time) can be shortened, and the relative positional displacement of the frame member 30 (transparent member 20) with respect to the glass member 10 can be suppressed.

[0052] The far-infrared transmitting unit U is a single-piece molded product made by resin molding using a mold. Specifically, the far-infrared transmitting unit U has a structure in which a resin frame member 30 is integrally molded around the outer circumference of a transmitting member 20 by insert molding. In the first embodiment, the outer circumference of the transmitting member 20 and the inner circumference of the frame member 30 are bonded together via an adhesive layer (second adhesive layer) 60. In the first embodiment, the transmitting member 20 and the frame member 30 are integrally molded by insert molding, but they may be assembled sequentially during the manufacturing of the vehicle glass 1.

[0053] In the examples shown in Figures 6 to 8, the transparent member 20 has a circular shape and a substantially constant thickness. The circular outer circumference of the transparent member 20 is held by the frame member 30. The outer peripheral end face 21 of the transparent member 20 faces the holding portion 31 of the frame member 30 in the radial direction. The inner surface 20B of the transparent member 20 faces the seating surface 34A formed on the holding portion 31 of the frame member 30 in the Z direction. The outer surface 20A of the transparent member 20 does not face (is not covered by) the frame member 30, even at its outer circumference, and is exposed to the outside of the vehicle.

[0054] The outer diameter DC of the fixing portion 32 of the frame member 30 (see Figures 3 and 8) is preferably 30 mm or more and 284 mm or less, more preferably 35 mm or more and 150 mm or less, and even more preferably 40 mm or more and 130 mm or less. By having the lower limit of the outer diameter DC within this range, it is possible to suppress the area that does not transmit visible light from becoming excessively large. By having the upper limit of the outer diameter DC within this range, it is possible to secure a sufficient area for providing the first adhesive layer 50 and to properly bond the glass member 10 and the frame member 30. Note that if the fixing portion 32 is circular in shape, the outer diameter DC refers to the diameter of the outer edge of the fixing portion 32, but if it is not circular, it refers to the length of the longest straight line connecting any two points on the outer edge of the fixing portion 32.

[0055] The holding portion 31 of the frame member 30 has a peripheral wall portion 33 that surrounds the outer periphery of the transparent member 20. The peripheral wall portion 33 is provided at the Z1 direction side (outside the vehicle) end of the holding portion 31. The peripheral wall portion 33 has an inner peripheral wall surface 33A that is radially opposite to the outer peripheral end surface 21 of the transparent member 20. In the radial direction, the peripheral wall portion 33 is located between the inner peripheral surface of the opening 19 and the outer peripheral end surface 21 of the transparent member 20. The Z1 direction side end surface of the peripheral wall portion 33 is exposed from inside the opening 19 to the outside of the vehicle (Z1 direction side). In other words, the Z1 direction side end surface of the peripheral wall portion 33 constitutes the outer surface 30A of the frame member 30. In the example of Figures 6 to 8, the peripheral wall portion 33 is a continuous ring shape extending along the outer peripheral end surface 21. The peripheral wall portion 33 surrounds and supports the outer periphery of the transparent member 20.

[0056] The thickness tw of the peripheral wall portion 33 is preferably 0.5 mm or more. The thickness tw of the peripheral wall portion 33 is the distance between the outer peripheral surface and the inner peripheral surface (inner peripheral wall surface 33A) of the peripheral wall portion 33. Here, if the permeable member 20 and the frame member 30 are manufactured by integral molding (insert molding), stress is generated due to the difference in the coefficient of linear expansion between the permeable member 20 and the frame member 30. Therefore, by making the thickness tw of the peripheral wall portion 33 0.5 mm or more, the mechanical strength of the frame member 30 can be improved. The thickness tw of the peripheral wall portion 33 is a representative value calculated from the overall thickness profile of the peripheral wall portion 33, and specifically, it is the average value of the thickness of the peripheral wall portion 33.

[0057] The holding portion 31 has a base portion 34 that protrudes radially inward from the outer peripheral end face 21 of the transparent member 20. The base portion 34 protrudes radially inward from the inner peripheral surface of the peripheral wall portion 33. In the Z direction, the base portion 34 overlaps with the outer peripheral portion of the transparent member 20. In other words, the base portion 34 and the outer peripheral portion of the transparent member 20 are aligned in the Z direction. The outer surface of the base portion 34 is the seating surface 34A. The base portion 34 supports the transparent member 20 from the inside of the vehicle. Hereinafter, the outer peripheral portion of the surface 20B of the transparent member 20 that faces the seating surface 34A in the Z direction will be referred to as the outer peripheral opposing surface FS.

[0058] As shown in the examples in Figures 6 to 8, the inner circumferential wall surface 33A and seat surface 34A that constitute the inner circumference of the frame member 30, and the outer circumferential end surface 21 and outer circumferential opposing surface FS that constitute the outer circumference of the transparent member 20 form the boundary portion PB between the frame member 30 and the transparent member 20. In the first embodiment, the second adhesive layer 60 is placed on at least a part of this boundary portion PB. The second adhesive layer 60 may be provided on the entire boundary portion PB. In that case, the transparent member 20 and the frame member 30 may not be in direct contact at the boundary portion PB, but may be indirectly in contact via the second adhesive layer 60. The second adhesive layer 60 may be provided on only a part of the boundary portion PB. In that case, the transparent member 20 and the frame member 30 will be in direct contact with each other in the portion of the boundary portion PB where the second adhesive layer 60 is not formed, and indirectly in contact via the second adhesive layer 60 in the portion where the second adhesive layer 60 is formed. The second adhesive layer 60 may be formed, for example, only between the inner circumferential wall surface 33A and the outer circumferential end surface 21, or the second adhesive layer 60 may be formed, for example, only between the seat surface 34A and the outer circumferential opposing surface FS.

[0059] In the examples shown in Figures 6 to 8, the second adhesive layer 60 is provided between the seating surface 34A and the outer peripheral opposing surface FS. The second adhesive layer 60 is not formed between the inner peripheral wall surface 33A and the outer peripheral end surface 21. Therefore, in the examples shown in Figures 6 to 8, a direct contact portion PB1 is formed at the boundary portion PB between the transparent member 20 and the frame member 30, where the transparent member 20 and the frame member 30 are in contact without any gaps. The direct contact portion PB1 is composed of the inner peripheral wall surface 33A and the outer peripheral end surface 21. The direct contact portion PB1 is formed on the Z1 direction side (outside the vehicle) of the boundary portion PB, relative to the second adhesive layer 60. In other words, in the first embodiment, the second adhesive layer 60 is not exposed to the Z1 direction side (outside the vehicle) of the vehicle glass 1. This prevents the second adhesive layer 60 from being exposed to water and sunlight from the outside of the vehicle, thus suppressing deterioration of the second adhesive layer 60.

[0060] In the example shown in Figure 6, the second adhesive layer 60 is formed over the entire radial width between the seating surface 34A and the outer peripheral opposing surface FS. The width of the second adhesive layer 60 may be smaller than the width of the seating surface 34A. In other words, the second adhesive layer 60 may be formed over only a portion of the total radial width of the seating surface 34A. The second adhesive layer 60 may also extend radially inward from the outer peripheral opposing surface FS.

[0061] In the plan view of Figure 7, the location where the second adhesive layer 60 is formed is indicated by hatching. As shown in Figure 7, it is preferable that the second adhesive layer 60 is formed in an annular shape along the outer circumference of the permeable member 20. The second adhesive layer 60 is continuous around the entire circumference of the outer peripheral opposing surface FS. As a result, the area on the vehicle side (Z2 direction side) beyond the second adhesive layer 60 and the area on the vehicle side (Z1 direction side) beyond the second adhesive layer 60 are completely separated between the seat surface 34A and the outer peripheral opposing surface FS. Even if water penetrates the boundary PB from the vehicle side, the second adhesive layer 60 prevents it from penetrating to the vehicle side. As a result, high water-sealing performance is obtained around the entire circumference of the boundary PB between the permeable member 20 and the frame member 30. The second adhesive layer 60 may not be ring-shaped, and may be provided locally at one or more locations in the circumferential direction of the transparent member 20, or it may be provided intermittently (in a broken manner) around the entire circumferential direction of the transparent member 20.

[0062] As shown in Figure 8, the second adhesive layer 60 has a contact surface 60A that contacts the outer surface of the permeable member 20. That is, the contact surface 60A contacts the outer surface FS. The second adhesive layer 60 also has a contact surface 60B that contacts the inner surface of the frame member 30. That is, the contact surface 60B contacts the seat surface 34A.

[0063] As shown in Figure 8, the thickness tb of the second adhesive layer 60 may be 0.2 mm or more. By making the thickness tb of the second adhesive layer 60 (length in the direction in which the opening 19 opens, length in the thickness direction of the glass member 10) 0.2 mm or more, manufacturing errors etc. can be absorbed by the second adhesive layer 60, and the step difference between the transparent member 20 and the frame member 30 can be reduced. The thickness tb of the second adhesive layer 60 is preferably 0.4 mm or more, more preferably 0.8 mm or more, more preferably 1.2 mm or more, more preferably 1.6 mm or more, and even more preferably 2 mm or more. Furthermore, the thickness tb of the second adhesive layer 60 is preferably 10 mm or less, more preferably 8 mm or less, more preferably 6 mm or less, and even more preferably 4 mm or less. In the first embodiment, the upper and lower numerical values ​​can be combined as appropriate.

[0064] The second adhesive layer 60 is formed with adhesives such as urethane adhesives, modified silicone adhesives, acrylic adhesives, epoxy adhesives, phenolic adhesives, epoxy-modified silicone adhesives, polyamide adhesives, polyester adhesives, polyurethane adhesives, and adhesives having properties such as thermosetting, moisture curing, two-component curing, ultraviolet curing, visible light curing, anaerobic curing, and thermoplasticity. It is preferable to use urethane adhesives or epoxy-modified silicone adhesives for the second adhesive layer 60. This improves load-bearing capacity, heat resistance, and cold resistance, and improves adhesive strength and shear strength.

[0065] The thickness tb of the second adhesive layer 60 may be 100 μm or less. By making the thickness tb of the second adhesive layer 60 (length in the direction in which the opening 19 opens, length in the thickness direction of the glass member 10) tb 100 μm or less, the adhesive that will become the second adhesive layer 60 can be formed by applying the adhesive that will become the second adhesive layer 60 as a primer to the bonding area when integrally molding (insert molding) the transparent member 20 and the frame member 30. By integrally molding the far-infrared transmitting unit U, the second adhesive layer 60 can be sufficiently adhered to both the transparent member 20 and the frame member 30, improving the watertightness of the boundary PB. In addition, integral molding allows for higher positional accuracy of the frame member 30 relative to the transparent member 20. The thickness tb of the second adhesive layer 60 is preferably 50 μm or less, more preferably 30 μm or less, and even more preferably 10 μm or less. This reduces the gap in the boundary PB at the location where the second adhesive layer 60 is formed, improving watertightness and suppressing exposure of the second adhesive layer 60 to water and sunlight. Furthermore, the thickness tb of the second adhesive layer 60 is preferably 0.1 μm or more, more preferably 0.5 μm or more, and even more preferably 1 μm or more. This allows for the formation of a second adhesive layer 60 with sufficient thickness to ensure adhesive strength and watertightness, thereby improving adhesive reliability.

[0066] The constituent material of the second adhesive layer 60 can also be an adhesive that can be applied as a primer when integrally molding (insert molding) the permeable member 20 and the frame member 30. In the first embodiment, it is preferable that the second adhesive layer 60 contains a silane coupling agent. The silane coupling agent is a compound containing silicon and having an organic reaction site that reacts with an organic material and an inorganic reaction site that reacts with an inorganic material. As a result, when the surface of the permeable member 20 is made of an inorganic material and the surface of the frame member 30 is made of an organic material, the silane coupling bond allows for strong adhesion between the inorganic material and the organic material, which are generally difficult to bond.

[0067] Figure 9 is a schematic diagram showing a bonding model between a silane coupling agent and a permeable member having an inorganic material surface. On the outer surface (outer surface facing surface FS) of the permeable member 20, there are particles of an inorganic material M, such as a metal or metal oxide. Near the surface of the permeable member 20, some of the inorganic material M has hydroxyl groups. The inorganic reaction site of the silane coupling agent forms hydrogen bonds with the inorganic material M, and then forms covalent bonds through a dehydration condensation reaction, resulting in a strong bond. Although not shown in Figure 9, the organic reaction site of the silane coupling agent forms a chemical bond with the organic material on the surface (seat surface 34A) of the frame member 30 through a reaction corresponding to the organic material it is bonding with. As a result, the silane coupling agent firmly adheres the inorganic material surface of the permeable member 20 to the organic material surface of the frame member 30. The silane coupling agent used in the second adhesive layer 60 is not particularly limited, but for example, 3-glycidoxypropyltrimethoxysilane can be used.

[0068] (Step difference between each component) As shown in Figure 8, in the first embodiment, the step difference D0 between the surface 20A on the Z1 direction side (outside the vehicle) of the transparent member 20 and the surface 12A on the Z1 direction side of the glass member 10 in the thickness direction (Z direction) of the transparent member 20 is 1.0 mm or less. The step difference D0 is more preferably 0.5 mm or less, even more preferably 0.3 mm or less, even more preferably 0.2 mm or less, and even more preferably 0.15 mm or less. In other words, it is preferable that the surface 20A on the Z1 direction side of the transparent member 20 and the surface 12A on the Z1 direction side of the glass member 10 are formed flush (continuously). Note that the surface 20A of the transparent member 20 and the surface 12A on the Z1 direction side of the glass member 10 are surfaces exposed on the Z1 direction side in the vehicle glass 1. In this way, the continuous surface 20A of the transparent member 20 on the Z1 direction side and the surface 12A of the glass member 10 on the Z1 direction side can suppress any impairment of the wiper's wiping effect. Furthermore, because the step D0 is small, it is possible to suppress any impairment of the vehicle's design due to the step D0, and to suppress any accumulation of sand, dust, etc., on the step D0.

[0069] In the thickness direction (Z direction) of the transparent member 20, it is preferable that the step D1 between the Z1-direction side (outside the vehicle) surface 20A of the transparent member 20 and the Z1-direction side surface 30A of the frame member 30 is 0.3 mm or less. More preferably, the step D1 is 0.2 mm or less, even more preferably 0.15 mm or less, and still more preferably 0.1 mm or less. In other words, it is preferable that the Z1-direction side surface 20A of the transparent member 20 and the Z1-direction side surface 30A of the frame member 30 are formed flush (continuously). Note that the surface 20A of the transparent member 20 and the Z1-direction side surface 30A of the frame member 30 are surfaces exposed in the Z1 direction on the vehicle glass 1. By making the Z1-direction side surface 20A of the transparent member 20 and the Z1-direction side surface 30A of the frame member 30 continuous in this way, it is possible to suppress the impairment of the wiper's wiping effect. Furthermore, because the step D1 is small, it is possible to suppress the risk of the step D1 compromising the design of the vehicle V, and the accumulation of sand and dust on the step D1.

[0070] Furthermore, in the first embodiment, it is preferable that the step D2 between the Z1-side surface 12A of the glass member 10 and the Z1-side surface 30A of the frame member 30 in the thickness direction (Z direction) of the transparent member 20 is 1.0 mm or less. More preferably, the step D2 is 0.5 mm or less, even more preferably 0.3 mm or less, even more preferably 0.15 mm or less, and even more preferably 0.1 mm or less. In other words, it is preferable that the Z1-side surface 12A of the glass member 10 and the Z1-side surface 30A of the frame member 30 are formed flush (continuously). By making the Z1-side surface 12A of the glass member 10 and the Z1-side surface 30A of the frame member 30 continuous in this way, it is possible to suppress the impairment of the wiper's wiping effect. In addition, because the step D2 is small, it is possible to suppress the risk of the step D2 impairing the design of the vehicle V, and the accumulation of sand and dust on the step D2.

[0071] The height of the step difference D0 in the thickness direction between the surface 20A of the transparent member 20 on the Z1 direction side and the surface 12A of the glass member 10 on the Z1 direction side can be measured, for example, by irradiating a laser using a laser displacement meter (Keyence Corporation, inline profile measuring instrument: LJ-X8200) into a region enclosed by a line segment 10 mm radially inward from the inner peripheral edge of the surface 30A of the frame member 30 and a line segment 10 mm radially outward from the outer peripheral edge of the surface 30A of the frame member 30, and then measuring the step difference profile obtained. The height of the step D1 in the thickness direction between the surface 20A of the transparent member 20 on the Z1 direction side and the surface 30A of the frame member 30 on the Z1 direction side can be measured, for example, by irradiating a laser using a laser displacement meter (Keyence Corporation, inline profile measuring instrument: LJ-X8200) into a region enclosed by a line segment 10 mm radially inward from the inner peripheral edge of the surface 30A of the frame member 30 and a line segment 10 mm radially outward from the outer peripheral edge of the surface 30A of the frame member 30, and then measuring the step profile obtained. Furthermore, the step difference D2 in the thickness direction between the surface 12A of the glass member 10 on the Z1 direction side and the surface 30A of the frame member 30 on the Z1 direction side can be measured, for example, by irradiating a laser into the area enclosed by a line segment 10 mm radially inward from the inner peripheral edge of the surface 30A of the frame member 30 and a line segment 10 mm radially outward from the outer peripheral edge of the surface 30A of the frame member 30, using a laser displacement meter (Keyence Corporation, inline profile measuring instrument: LJ-X8200), and obtaining a step difference profile. Note that the peripheral edges of the surface 20A of the transparent member 20, the surface 30A of the frame member 30, and the surface 12A of the glass member 10 may be chamfered. In that case, the heights of the steps D0, D1, and D2 are the difference in Z-direction positions between the surface positions of the flat parts near the outer periphery, excluding the chamfered parts. The flat portion near the outer periphery is, for example, a flat portion within a radius of 1 mm from the chamfered portion.

[0072] The transparent member 20 may be molded to match the curved shape of the vehicle glass 1 to which it is applied. This allows the surface of the transparent member 20 to be aesthetically smooth. The method of forming the transparent member 20 is not particularly limited, but polishing or mold forming can be selected depending on the curved shape and the member. When the transparent member 20 is formed by polishing, it is desirable to polish the transparent member 20 in parallel to improve its flatness accuracy. This flatness accuracy is an indicator of the reflective surface accuracy at a measurement wavelength of 632.8 nm, and it is preferable that the number of Newton lines is 2 or less. The ass, which indicates the difference in the number of Newton lines in the vertical and horizontal directions, is preferably 0.5 or less, and the distortion, which indicates the local distortion of the Newton fringes, is preferably 0.5 or less. This allows the far-infrared camera CA1 to acquire far-infrared images without distortion. Here, the number of Newton lines, ass, and distortion can be measured according to the instructions of JIS B0091:2010 and ISO 14999-4:2007, and the number of fringes, wavelength, or nanometers are used as units.

[0073] (Method for manufacturing vehicle glass) The method for manufacturing vehicle glass 1 is not particularly limited, but one example is described below. Figure 10 is a schematic diagram illustrating an example of a method for manufacturing vehicle glass according to the first embodiment.

[0074] As shown in Figure 10, the second adhesive layer 60 is placed on the outer periphery of the transparent member 20 as a primer (step S10). In the example shown in Figures 7 to 9, the second adhesive layer 60 is applied to the outer periphery opposing surface FS, which is the outer periphery of the surface 20B of the transparent member 20. The second adhesive layer 60 is applied to a predetermined thickness such that the final thickness tb after bonding is 100 μm or less.

[0075] Next, a frame member 30 is formed on the outer periphery of the transparent member 20 (step S12). Specifically, the transparent member 20 coated with the second adhesive layer 60 is placed in the mold 70, and a resin frame member 30 is formed around the transparent member 20 by injection molding (insert molding). In injection molding, the inner surface of the mold corresponding to the surface 30A of the frame member 30 is aligned with the surface 20A of the transparent member 20, so that the step difference D1 between the surface 20A of the transparent member 20 and the surface 30A of the frame member 30 is 0.3 mm or less. Note that Figure 10 shows the mold 70 schematically, and the divided structure of the mold 70 is omitted, showing only the outline of the cavity. By injection molding, a far-infrared transmitting unit U including the transparent member 20 and the frame member 30 is manufactured. In the far-infrared transmitting unit U, the outer periphery opposing surface FS of the transparent member 20 and the seating surface 34A of the frame member 30 are bonded via a second adhesive layer 60 with a thickness of 100 μm or less.

[0076] Next, a glass member 10 with an opening 19 is prepared, and the far-infrared transmitting unit U is placed inside the opening 19 (step S14). At this time, with the first adhesive layer 50 placed on the fixing portion 32 of the frame member 30, the far-infrared transmitting unit U is inserted into the opening 19, so that the first adhesive layer 50 is placed between the surface 18B around the opening 19 of the glass member 10 and the fixing portion 32 of the frame member 30. In addition, a jig 71 is applied to the surface 12A of the glass member 10 and the surface 30A of the frame member 30, either in a planar shape or to match the curved shape of the surface 12A of the glass member 10, and the relative position of the far-infrared transmitting unit U in the Z direction with respect to the glass member 10 is adjusted so that the step difference D2 is within 1.0 mm and the step difference D0 between the surface 20A of the transmitting member 20 and the surface 12A of the glass member 10 is within 1.0 mm.

[0077] Then, while maintaining the relative position between the glass member 10 and the far-infrared transmitting unit U, the first adhesive layer 50 is cured (step S16). The curing method for the first adhesive layer 50 is determined according to the type (components) of the first adhesive layer 50 used. Curing methods include, for example, vaporizing the solvent over time, reacting with moisture in the air, curing by heating, melting the first adhesive layer 50 by heating and then curing it as it cools, adding a curing agent, or irradiating with light such as ultraviolet light.

[0078] When using an epoxy-modified silicone adhesive as the first adhesive layer 50, the method of bonding the frame member 30 and the glass member 10 with the first adhesive layer 50 may be arbitrary, but it is preferable to apply a two-stage heating process as follows: Apply the adhesive (the first adhesive layer 50 before curing) to one of the frame member 30 and the glass member 10 (application step), heat the applied adhesive (first heating step), attach the member with the adhesive applied (one of the frame member 30 and the glass member 10) to the other member (the other of the frame member 30 and the glass member 10) via the adhesive (attachment step), and heat the adhesive to cure it (second heating step). This is preferable because it allows for proper temporary fixing while bonding.

[0079] The above process completes the manufacturing of one example of vehicle glass 1.

[0080] Here, the glass member 10 according to the first embodiment can be manufactured, for example, by the following method. First, flat glass substrates 12 and 14 are prepared, and openings 12a and 14a are formed in them. Then, each of the flat glass substrates 12 and 14 in which the openings 12a and 14a are formed is bent into a shape that fits the windshield of the vehicle V. Then, the bent glass substrate 12 and the glass substrate 14 are joined via an intermediate layer 16 to form a laminated glass. The intermediate layer 16 may be removed and made to communicate only in the portion overlapping the opening 12a and the opening 14a by thermal or chemical means after forming the laminated glass. Note that the light-shielding layer 18 may be formed at any stage, for example, before the bending process. Also, the light-shielding layer 18 may not be formed. Further, the opening 19 may be formed after joining the glass substrate 12 and the glass substrate 14. In the manufacture of the glass member 10 in this case, flat glass substrates 12 and 14 are prepared. Next, as the light-shielding layer 18, for example, a black ceramic printing material is applied to the glass substrate 14, and the glass substrates 12 and 14 are each bent. Next, the bent glass substrate 12 and the glass substrate 14 are joined via an intermediate layer 16 to form a laminated glass. Then, the openings 12a and 14a are formed in the laminated glass at once. Thereby, the opening 19 is formed.

[0081] (Modification) Next, a modification of the first embodiment will be described. In the above-described first embodiment, an example in which the first adhesive layer 50 is composed of one type of material (one type of adhesive) has been described. However, as will be described in the following modifications, the first adhesive layer 50 may have a plurality of adhesive layers composed of different materials. This will be specifically described below.

[0082] Figure 11 is a plan view and a cross-sectional view of a modified far-infrared transmission unit. As shown in Figure 11, in the modified example, the first adhesive layer 50 includes a main adhesive layer 50A and a secondary adhesive layer 50B. The main adhesive layer 50A is an adhesive layer made of an adhesive, and the secondary adhesive layer 50B is an adhesive layer made of a different material than the main adhesive layer 50A. Note that the first adhesive layer 50 is not limited to being composed of two types of adhesive layers made of different materials, the main adhesive layer 50A and the secondary adhesive layer 50B, but may be composed of three or more types of adhesive layers made of different materials.

[0083] The adhesive used to constitute the main adhesive layer 50A is the same adhesive as that used for the first adhesive layer 50 described in the first embodiment above. It is preferably a urethane adhesive, more preferably a polyurethane-based adhesive, and WS series adhesives manufactured by Sika Japan may be used.

[0084] The secondary adhesive layer 50B preferably has a higher initial adhesive strength than the main adhesive layer 50A. Here, initial adhesive strength refers to the adhesive strength immediately after the adhesive layer is formed on the vehicle glass 1 (for example, about one hour later). Adhesion strength may refer to the adhesive strength measured by a tensile adhesive strength test (JIS K 6849). This allows the frame member 30 and the glass member 10 to be temporarily bonded by the secondary adhesive layer 50B before the main adhesive layer 50A hardens and exerts sufficient adhesive strength, thereby suppressing the relative positional displacement of the frame member 30 (transparent member 20) with respect to the glass member 10.

[0085] The secondary adhesive layer 50B may be composed of an adhesive with a shorter curing time than the adhesive in the main adhesive layer 50A. This allows for temporary fixing with the secondary adhesive layer 50B, which has a shorter curing time, and permanent fixing with the main adhesive layer 50A, which has a longer curing time. This suppresses displacement of the frame member 30 during manufacturing and reduces the time required to place the vehicle glass 1 in the processing position for fixing. When the secondary adhesive layer 50B is composed of an adhesive, it is preferable to use a hot-melt type adhesive, and the Aronmelt series manufactured by Toagosei Co., Ltd. may be used. The hot-melt type adhesive material preferably includes one of the following adhesives: epoxy, ethylene vinyl acetate copolymer, polyamide, synthetic rubber, acrylic, polyurethane, polyolefin, polyester, or silicone, and it is particularly preferable to use an epoxy adhesive.

[0086] The secondary adhesive layer 50B may be an adhesive tape comprising a base material and an adhesive layer. In this case, the secondary adhesive layer 50B may be a double-sided tape with adhesive layers formed on both sides of the base material. Since the adhesive tape does not require a curing time and can immediately exert adhesive strength, the secondary adhesive layer 50B can be used for temporary fixing, and the main adhesive layer 50A can be used for permanent fixing. This suppresses displacement of the frame member 30 during manufacturing and shortens the time required to place the vehicle glass 1 in the processing position.

[0087] As shown in Figure 11, the main adhesive layer 50A is preferably formed in an annular shape on the fixing portion 32 of the frame member 30 (on the surface 14B on the Z2 direction side around the opening 19 of the glass member 10), or in other words, it is preferably formed continuously over the entire circumference in the circumferential direction. This prevents water from penetrating into the interior of the vehicle even if it seeps in between the frame member 30 and the glass member 10. The secondary adhesive layer 50B may be provided on the fixing portion 32 of the frame member 30 (on the surface 14B on the Z2 direction side around the opening 19 of the glass member 10) over only a portion of the entire circumference in the circumferential direction, or it may be provided locally at one or more locations in the circumferential direction, or it may be provided intermittently (discontinuously) over the entire circumference of the transparent member 20 in the circumferential direction. In Figure 11, the secondary adhesive layer 50B is provided locally at four locations in the circumferential direction, but this number is just an example. By not providing the secondary adhesive layer 50B over the entire circumference in this manner, the area of ​​the secondary adhesive layer 50B can be appropriately fixed without making it excessively large. However, this is not limited to this; the main adhesive layer 50A may be provided only on a part of the entire circumference in the circumferential direction, or the secondary adhesive layer 50B may be provided over the entire circumference in the circumferential direction. Also, in the example in Figure 11, the secondary adhesive layer 50B is circular when viewed from the Z direction, but its shape may be arbitrary.

[0088] Furthermore, it is preferable that the secondary adhesive layer 50B is located radially inward from the main adhesive layer 50A. This allows the main adhesive layer 50A, which is radially outward, to seal the secondary adhesive layer, thereby effectively suppressing water penetration into the interior of the vehicle. However, this is not limited to the secondary adhesive layer 50B, which may be located radially outward from the main adhesive layer 50A.

[0089] Furthermore, it is preferable that the secondary adhesive layer 50B and the main adhesive layer 50A are not in contact. This ensures that the adhesive strength of the main adhesive layer 50A is adequately maintained. However, this is not limited to the secondary adhesive layer 50B and the main adhesive layer 50A may be in contact.

[0090] Furthermore, it is preferable that the area of ​​the main adhesive layer 50A (the area occupied by the main adhesive layer 50A as viewed from the Z direction) be larger than the area of ​​the sub-adhesive layer 50B (the area occupied by the sub-adhesive layer 50B as viewed from the Z direction). The ratio of the area of ​​the main adhesive layer 50A to the area of ​​the sub-adhesive layer 50B (area of ​​the main adhesive layer 50A / area of ​​the sub-adhesive layer 50B) is preferably 2 or more, more preferably 5 or more, more preferably 10 or more, more preferably 15 or more, and even more preferably 20 or more. Furthermore, the ratio of the area of ​​the main adhesive layer 50A to the area of ​​the sub-adhesive layer 50B (area of ​​the main adhesive layer 50A / area of ​​the sub-adhesive layer 50B) is preferably 1000 or less, more preferably 800 or less, more preferably 600 or less, more preferably 400 or less, and even more preferably 200 or less. This allows for convenient temporary and permanent fixing, and also reduces the step difference between the glass member 10 and the transparent member 20.

[0091] In addition, the second adhesive layer 60 may also be provided with multiple adhesive layers made of different materials, similar to the first adhesive layer 50. In this case, the configuration of the multiple adhesive layers used in the second adhesive layer 60 is the same as that of the main adhesive layer 50A and the secondary adhesive layer 50B of the first adhesive layer 50, so the explanation is omitted.

[0092] (Second Embodiment) Figure 12A is an enlarged cross-sectional view of the area around the boundary between the transparent member and the frame member in the vehicle glass according to the second embodiment. The vehicle glass 1 according to the second embodiment differs from the first embodiment in that a first vertical wall (vertical wall) 202 is provided on the fixing portion 32 of the frame member 30, and a second vertical wall (vertical wall) 212 is provided on the base portion 34. The second embodiment can also be applied to the above-described modifications. That is, in the second embodiment, the first adhesive layer 50 may be composed of a plurality of adhesive layers, and the second adhesive layer 60 may be composed of a plurality of adhesive layers.

[0093] As shown in Figure 12A, the first vertical wall 202 of the second embodiment is positioned around the entire circumference of the outer end of the fixing portion 32 of the frame member 30. The first vertical wall 202 protrudes toward the glass member 10. The distance of the first vertical wall 202 protruding from the fixing portion 32 is shorter than the thickness ta of the first adhesive layer 50. In other words, the first vertical wall 202 is separated from the contact surface between the first adhesive layer 50 and the glass member 10 and does not come into contact with the glass member 10. The first vertical wall 202 covers the outer periphery of the space in which the first adhesive layer 50 is positioned. As a result, the first vertical wall 202 acts as a barrier for the first adhesive layer 50, preventing it from leaking out to the outer periphery of the fixing portion 32 and holding the first adhesive layer 50 in a predetermined position.

[0094] Figure 12B is an enlarged cross-sectional view of the area around the boundary between the transparent member and the frame member in the vehicle glass according to the second embodiment. When the first adhesive layer 50 is composed of multiple adhesive layers, as shown in Figure 12B, the first vertical wall 202 may be provided at a position between the main adhesive layer 50A and the sub-adhesive layer 50B in the radial direction. This prevents the main adhesive layer 50A and the sub-adhesive layer 50B from coming into contact or mixing. In the example of Figure 12B, the first vertical wall 202 is provided at both a position on the outer periphery of the entire first adhesive layer 50 and at a position between the main adhesive layer 50A and the sub-adhesive layer 50B in the radial direction, but the first vertical wall 202 may be provided at only one of these positions.

[0095] The second vertical wall 212 is positioned around the entire circumference of the inner end of the base portion 34 of the frame member 30. The second vertical wall 212 protrudes toward the transparent member 20. The distance of the second vertical wall 212 protruding from the base portion 34 is shorter than the thickness tb of the second adhesive layer 60. In other words, the second vertical wall 212 is separated from the contact surface between the second adhesive layer 60 and the transparent member 20 and does not come into contact with the transparent member 20. The second vertical wall 212 covers the inner side of the space where the second adhesive layer 60 is positioned. As a result, the second vertical wall 212 acts as a barrier for the second adhesive layer 60, preventing it from leaking to the inner side of the base portion 34 and holding the second adhesive layer 60 in a predetermined position. If the second adhesive layer 60 is composed of multiple adhesive layers, the second vertical wall 212 may be provided at a position between the main adhesive layer and the secondary adhesive layer in the radial direction. This prevents the main adhesive layer and the secondary adhesive layer from coming into contact or mixing.

[0096] By providing the first vertical wall 202 and the second vertical wall 212 in the frame member 30, leakage of the first adhesive layer 50 and the second adhesive layer 60 can be suppressed, and it is possible to prevent them from overflowing from a predetermined area and adhering to positions other than the placement positions of the glass member 10 and the transparent member 20. In the second embodiment, both the first vertical wall 202 and the second vertical wall 212 are provided, but only one of the first vertical wall 202 and the second vertical wall 212 may be provided. For example, only the first vertical wall 202 may be provided.

[0097] (Third Embodiment) Figure 13 is an enlarged cross-sectional view of the area around the boundary between the transparent member and the frame member in the vehicle glass according to the third embodiment. The vehicle glass 1 according to the third embodiment differs from the second embodiment in that the fixing portion 32 has a through hole 222. The third embodiment can also be applied to the above-described modifications. That is, in the third embodiment, the first adhesive layer 50 may be composed of a plurality of adhesive layers, or the second adhesive layer 60 may be composed of a plurality of adhesive layers.

[0098] As shown in Figure 13, the through-hole 222 in the third embodiment is a hole that penetrates the fixing portion 32 in the thickness direction of the glass member 10, that is, a hole that penetrates from the surface in contact with the first adhesive layer 50 to the opposite surface. A portion 224 of the adhesive layer 50 flows into the through-hole 222. There should be at least one through-hole 222 in the circumferential direction of the fixing portion 32, but it is preferable to provide multiple through-holes 222 in the circumferential direction.

[0099] In the third embodiment, the vehicle glass 1 is provided with through holes 222, which allows excess first adhesive layer 50 to flow into the through holes 222, thereby reducing the step difference between the glass member 10 and the transparent member 20. Furthermore, by providing through holes 222, the contact area between the first adhesive layer 50 and the air can be increased, reducing the time required for the first adhesive layer 50 to solidify.

[0100] (Fourth Embodiment) Figure 14 is an enlarged cross-sectional view of the base portion of the vehicle glass according to the fourth embodiment. The vehicle glass 1 according to the fourth embodiment differs from the first embodiment in that the surface of the base portion 34 that is in contact with the second adhesive layer 60 has a recess 232. The fourth embodiment can also be applied to the above-described modifications. That is, in the fourth embodiment, the first adhesive layer 50 may be composed of a plurality of adhesive layers, or the second adhesive layer 60 may be composed of a plurality of adhesive layers.

[0101] The recess 232 is located on at least a portion of the circumferential surface of the base portion 34 that is in contact with the second adhesive layer 60. The recess 232 is located where one circumferential end 242 and the other end 244 of the second adhesive layer 60 are in contact. The circumferential ends 242 and 244 of the second adhesive layer 60 are the starting and ending points in the circumferential direction when the second adhesive layer 60 is applied during manufacturing.

[0102] By providing the recess 232 in the vehicle glass 1, the portion where the second adhesive layer 60 overlaps and becomes thicker than other parts can be absorbed by the recess 232. This makes the circumferential thickness of the second adhesive layer 60 more uniform and reduces the step difference between the transparent member 20 and the frame member 30.

[0103] (Effects) As described above, the vehicle glass 1 according to the first aspect of this disclosure comprises a glass member having an opening formed therein that penetrates from the surface on the first direction side to the surface on the second direction side opposite to the first direction, and a far-infrared transmitting unit disposed inside the opening, wherein the far-infrared transmitting unit includes a transmitting member that transmits far-infrared rays, a frame member that holds the transmitting member, and a first adhesive layer with a thickness of 0.2 mm or more that adheres the opening of the glass member to the outer periphery of the frame member, wherein the step difference between the surface on the first direction side of the transmitting member and the surface on the first direction side of the glass member in the thickness direction of the transmitting member is 1.0 mm or less. According to this disclosure, by making the thickness of the first adhesive layer 0.2 mm or more, the step difference between the glass member and the transmitting member can be reduced by the flexibility of the first adhesive layer. As a result, the frame member can be fixed to the glass member without hindering wiping by the wiper.

[0104] A vehicle glass 1 according to a second aspect of this disclosure is a vehicle glass 1 according to a first aspect, wherein the first adhesive layer includes a main adhesive layer made of an adhesive and a secondary adhesive layer formed of a material different from the main adhesive layer.

[0105] The vehicle glass 1 according to the third aspect of this disclosure is the vehicle glass 1 according to the second aspect, wherein the secondary adhesive layer has a higher initial adhesive strength than the main adhesive layer.

[0106] The vehicle glass 1 according to the fourth aspect of this disclosure is the vehicle glass 1 according to the third aspect, wherein the ratio of the application area of ​​the main adhesive layer to the application area of ​​the secondary adhesive layer is 2 or more and 1000 or less.

[0107] The vehicle glass 1 according to the fifth aspect of this disclosure is the vehicle glass 1 according to the third or fourth aspect, wherein the secondary adhesive layer is located radially inward from the main adhesive layer.

[0108] The vehicle glass 1 according to the sixth aspect of this disclosure is the vehicle glass 1 according to any of the second to fifth aspects, wherein the secondary adhesive layer includes an adhesive with a shorter curing time than the adhesive of the main adhesive layer.

[0109] The vehicle glass 1 according to the seventh aspect of this disclosure is the vehicle glass 1 according to any of the second to fifth aspects, wherein the secondary adhesive layer is an adhesive tape including a base material and an adhesive layer.

[0110] The eighth aspect of this disclosure of vehicle glass 1 is a vehicle glass 1 according to any of the first to seventh aspects, wherein the first adhesive layer includes an epoxy-modified silicone adhesive.

[0111] A vehicle glass 1 according to the ninth aspect of this disclosure is a vehicle glass 1 according to the first to eighth aspects, wherein the frame member has a vertical wall projecting toward the glass member on the outer peripheral side of the location where the first adhesive layer is formed.

[0112] A vehicle glass 1 according to the tenth aspect of this disclosure is a vehicle glass 1 according to the first to ninth aspects, wherein the frame member has a recess in the region in contact with the first adhesive layer.

[0113] A vehicle glass 1 according to the eleventh aspect of this disclosure is a vehicle glass 1 according to the first to tenth aspects, further comprising a second adhesive layer with a thickness of 0.2 mm or more that adheres the outer periphery of the transparent member to the inner periphery of the frame member.

[0114] A vehicle glass 1 according to a twelfth aspect of the present disclosure is a vehicle glass 1 according to an eleventh aspect, wherein the frame member has a vertical wall projecting toward the transparent member on the inner circumference side of the location where the second adhesive layer is formed.

[0115] Although embodiments of the present invention have been described above, the embodiments are not limited to those described herein. Furthermore, the aforementioned components include those that can be easily conceived by those skilled in the art, those that are substantially the same, and those that fall within the so-called equivalent range. Moreover, the aforementioned components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the embodiments described above.

[0116] 1 Vehicle glass 10 Glass member 19 Opening 20 Transmitting member 30 Frame member 31 Holding part 32 Fixing part 33 Peripheral wall part 34 Base part 50 Adhesive layer (first adhesive layer) 60 Adhesive layer (second adhesive layer) 100 Camera unit A1 Light-transmitting area A2, A2a Light-blocking area B Far-infrared transmitting area C Visible light transmitting area CA1 Far-infrared camera CA2 Visible light camera D0 Step D1 Step D2 Step PB Boundary PB1 Direct contact area ta, tb Thickness (thickness of adhesive layer) U Far-infrared transmitting unit V Vehicle

Claims

1. A vehicle glass comprising: a glass member having an opening formed therein that penetrates from the surface on a first direction side to the surface on a second direction side opposite to the first direction; and a far-infrared transmitting unit disposed inside the opening, wherein the far-infrared transmitting unit includes a transmitting member that transmits far-infrared rays, a frame member that holds the transmitting member, and a first adhesive layer with a thickness of 0.2 mm or more that bonds the glass member and the outer periphery of the frame member, wherein the step difference between the surface on the first direction side of the transmitting member and the surface on the first direction side of the glass member in the thickness direction of the transmitting member is 1.0 mm or less.

2. The vehicle glass according to claim 1, wherein the first adhesive layer comprises a main adhesive layer made of an adhesive and a secondary adhesive layer made of a material different from the main adhesive layer.

3. The vehicle glass according to claim 2, wherein the secondary adhesive layer has a higher initial adhesive strength than the main adhesive layer.

4. The ratio of the area of ​​the main adhesive layer to the area of ​​the sub-adhesive layer is 2 or more and 1000 or less, the vehicle glass according to claim 3.

5. The vehicle glass according to claim 3, wherein the secondary adhesive layer is located radially inward from the main adhesive layer.

6. The vehicle glass according to claim 2, wherein the secondary adhesive layer includes an adhesive with a shorter curing time than the adhesive of the main adhesive layer.

7. The vehicle glass according to claim 2, wherein the secondary adhesive layer is an adhesive tape comprising a base material and an adhesive layer.

8. The vehicle glass according to claim 1, wherein the first adhesive layer comprises an epoxy-modified silicone adhesive.

9. The vehicle glass according to claim 1, wherein the frame member has a vertical wall projecting toward the glass member on the outer periphery side of the location where the first adhesive layer is formed.

10. The vehicle glass according to claim 1, wherein the frame member has a recess in the region in contact with the first adhesive layer.

11. The vehicle glass according to claim 1, further comprising a second adhesive layer with a thickness of 0.2 mm or more for bonding the outer periphery of the transparent member and the inner periphery of the frame member.

12. The vehicle glass according to claim 11, wherein the frame member has a vertical wall projecting toward the transparent member on the inner circumference side of the location where the second adhesive layer is formed.

Images