Imaging device and window glass equipped with imaging device

Abstract

Provided are: an imaging device that can be fixed to a structure surrounding window glass stably in the long term; and window glass equipped with an imaging device.　The imaging device comprises: a housing that is configured to be installed to the indoor side of window glass of a building, and that has a first surface which is configured to face a main surface of the window glass on the indoor side and a side surface which has an angle with respect to the first surface; a fixing part that is configured to attach or adhere the side surface to a structure surrounding the window glass; a lens that is provided to the first surface; and an imaging part that is disposed inside the housing and that is configured to be capable of imaging the outdoor side of the window glass through the lens.

Description

Imaging device and window glass with imaging device

[0001] The present disclosure relates to an imaging device and a window glass equipped with an imaging device.

[0002] A conventional window camera includes an imaging unit that captures an outdoor image from the indoor surface of a window glass, a housing having a rectangular mounting surface facing the indoor surface and recessing the imaging unit into the mounting surface with the optical axis of the imaging unit aligned with the intersection of a pair of diagonal lines of the mounting surface, and a light-blocking member made of an elastic material, protruding from the mounting surface toward the indoor surface and formed in a rectangular frame shape that conforms to the outer shape of the mounting surface, and elastically deforming when pressed by the housing to close the gap between the indoor surface and the mounting surface. This window camera is fixed to the indoor surface of the window glass by a suction cup member of a suction cup suction mechanism of the housing. The suction cup member is made of an elastic material (see, for example, Patent Document 1 listed below).

[0003] Japanese Patent Application Laid-Open No. 2021-111812

[0004] However, the suction cups that adhere to the indoor surface (the main surface facing the interior) of the window glass are made of an elastic material such as silicone rubber, and are therefore exposed to ultraviolet light that passes through the window glass. Elastic materials such as silicone rubber deteriorate due to ultraviolet light, which can cause the window camera to fall, making it difficult to stably hold the window camera in place for a long period of time.

[0005] Therefore, an object of the present invention is to provide an imaging device that can be stably fixed to a structure around a window glass over a long period of time, and a window glass equipped with an imaging device.

[0006] An imaging device according to an embodiment of the present disclosure includes a housing configured to be installed on the indoor side of a window glass of a building, the housing having a first surface configured to face the indoor main surface of the window glass and a side surface angled relative to the first surface, a fixing unit configured to adsorb or adhere the side surface to a structure surrounding the window glass, a lens provided on the first surface, and an imaging unit disposed within the housing and configured to be able to capture an image of the outdoor side of the window glass via the lens.

[0007] It is possible to provide an imaging device that can be stably fixed to a structure around a windowpane over a long period of time, and a windowpane equipped with an imaging device.

[0008] FIG. 2B is a diagram showing an example of the arrangement of an imaging device according to an embodiment. FIG. 3 is a diagram showing an enlarged view of an example of the configuration of the imaging device and its surroundings in FIG. 1A. FIG. 4 is a diagram showing an example of the configuration of an imaging device according to an embodiment. FIG. 5 is a diagram showing an example of the configuration of an imaging device according to an embodiment. FIG. 6 is a diagram showing an example of the configuration of a cross section taken along the line IIC-IIC in FIG. 2B. FIG. 7 is a diagram showing an example of the configuration of an imaging device according to a modified example of an embodiment. FIG. 8 is a diagram showing an example of the configuration of an imaging device according to a modified example of an embodiment.

[0009] Hereinafter, embodiments of the imaging device and window glass with an imaging device according to the present disclosure will be described. In the following, the same elements will be denoted by the same reference numerals, and duplicated descriptions may be omitted.

[0010] In the following description, for ease of understanding, the scale of each component in the drawings may differ from the actual scale. In this embodiment, a three-dimensional Cartesian coordinate system with three axes (X-axis, Y-axis, and Z-axis) is used. For example, the width (horizontal) direction of the window glass is the X-axis, the height (height) direction of the window glass is the Y-axis, and the thickness (thickness) direction of the window glass is the Z-axis. For example, the direction from bottom to top of the window glass is the +Y-axis, and the opposite direction is the −Y-axis. For example, the indoor side of the window glass is the +Z-axis, and the outdoor side of the window glass is the −Z-axis. In the following description, the +Y-axis direction may be referred to as "up" and the −Y-axis direction may be referred to as "down." Furthermore, a planar view refers to a view from the XY plane. For example, the X-axis and Z-axis directions are approximately parallel to a direction parallel to a horizontal plane (horizontal direction), and the Y-axis direction is approximately parallel to a vertical direction perpendicular to the horizontal plane.

[0011] The X-axis, Y-axis, and Z-axis directions represent directions parallel to the X-axis, Y-axis, and Z-axis, respectively. The X-axis, Y-axis, and Z-axis directions are perpendicular to one another. The XY plane, YZ plane, and ZX plane represent imaginary planes parallel to the X-axis and Y-axis directions, imaginary planes parallel to the Y-axis and Z-axis directions, and imaginary planes parallel to the Z-axis and X-axis directions, respectively.

[0012] 1A is a diagram showing an example of the arrangement of an imaging device 100 when a window 10 of a building 1 is viewed from the outside. Fig. 1B is a diagram showing an enlarged view of an example of the imaging device 100 and its surrounding configuration in Fig. 1A. Figs. 1A and 1B show a window 10 provided in a wall 1W of the building 1. The building 1 is an example of a structure.

[0013] The window 10 has a window glass 11 and a window frame 12. The window frame 12 is an example of a structure surrounding the window glass 11. The window glass 11 is, for example, a fixed window, but may also be a sliding window or the like. FIG. 1B shows a portion of the window glass 11 and the window frame 12. As an example, a configuration in which the window frame 12 is made of a magnetic metal will be described.

[0014] The imaging device 100 is installed and used so as to face the indoor-side main surface 11A (see FIG. 1B ) of a window glass 11 provided in a window 10 of the building 1. As an example, the imaging device 100 is a box-shaped device that is triangular in plan view, and is placed at the corners on the +X-axis direction and +Y-axis direction sides of the window glass 11 and window frame 12.

[0015] Here, the window glass 11, the window frame 12, and the imaging device 100 constitute the window glass with imaging device 200 of the embodiment. However, the window glass with imaging device 200 may be configured to include the window glass 11 and the imaging device 100 but not include the window frame 12.

[0016] The imaging device 100 is a device that captures an outdoor image through a window glass 11, and is connected, for example, via a cable 101 (see FIG. 1B ) to a processing device that performs image processing, etc. The imaging device 100 transmits image data to the processing device via the cable 101. The imaging device 100 also receives, via the cable 101, a control signal from the processing device that switches the imaging unit 140 on / off, etc., and is supplied with power from the processing device.

[0017] The processing device is located inside the building 1, but is not shown in Figures 1A and 1B. For example, the processing device may be connected to an information processing device such as an outdoor server via a wireless communication device or cable provided inside the building 1. Furthermore, for example, the processing device may be connected to an information processing device such as a personal computer (PC) or server provided inside the building 1 via a cable or wireless communication device, and the PC or server may be connected to an outdoor higher-level server or the like via a cable or wireless communication device.

[0018] Here, a form in which the window glass 11 is attached to the building 1 will be described, but the window glass 11 may also be attached to a structure other than the building 1. The structure other than the building 1 may be, for example, a civil engineering structure such as a bridge pier, a bridge, or a dam, a historical structure, an artistic structure, or the like.

[0019] The window glass 11 is a glass plate used in a window of a structure such as the building 1. The window glass 11 may be a glass facade at the entrance of the building 1, for example. The window glass 11 is formed, for example, in a rectangular shape in a plan view, and has an outer surface of the building 1 and an inner surface of the building 1. The inner surface of the building 1 refers to the indoor side of the building 1. The thickness of the window glass 11 is set according to the specifications of the building 1. Note that the term "rectangular" means a rectangular or square shape, as well as a rectangular or square shape with chamfered corners. The shape of the window glass in a plan view is not limited to a rectangular shape, and may be another shape such as a circular shape.

[0020] The window glass 11 is not limited to a single pane, but may be laminated glass or double-glazed glass. The window glass 11 may also be Low-E glass, light control glass, or glass containing linear members.

[0021] Examples of materials for the window glass 11 include soda lime silica glass, borosilicate glass, aluminosilicate glass, and alkali-free glass.

[0022] The thickness of the window glass 11 is preferably 1.0 to 20 mm. If the thickness of the window glass 11 is 1.0 mm or more, the window 10 has sufficient strength for attaching the imaging device 100. Furthermore, if the thickness of the window glass is 20 mm or less, the window 10 has sufficient radio wave transmission performance for the wireless communication device to stably connect via wireless communication to an information processing device such as an outdoor server. The thickness of the window glass is more preferably 3.0 to 15 mm, and even more preferably 9.0 to 13 mm.

[0023] The reflectance of the outer surface of the window glass 11 is, for example, 3% or more. The window glass 11 has a visible light transmittance (TVA) of 30% to 98% based on the standard A light source specified in JIS R 3106:1998. If the TVA of the window glass 11 is 30% or more, the imaging device 100 will have sufficient image quality when capturing an outdoor image through the window glass 11. If the TVA of the window glass 11 is 98% or less, the imaging device 100 will have excellent solar radiation blocking properties. The TVA of the window glass 11 is preferably 50% or more, more preferably 70% or more, even more preferably 75% or more, and particularly preferably 80% or more. The TVA of the window glass 11 is preferably 95% or less, more preferably 92% or less, even more preferably 90% or less, and particularly preferably 85% or less.

[0024] The imaging device 100 is a device that is attached to the indoor side of a windowpane 11 of a building 1 and is capable of capturing moving and still images. Note that the schematic configuration and functions of the imaging device 100 will be described in Figures 1A and 1B, and the detailed configuration of the imaging device 100 will be described later using Figures 2A to 2C in addition to Figures 1A and 1B.

[0025] The imaging device 100 includes a lens 130 facing the indoor main surface 11A of the window glass 11, and captures an outdoor subject through the lens 130 and the window glass 11. The subject is, for example, the scenery seen through the window glass 11 (everything visible through the window glass 11), and the scenery may be, for example, a road, a sidewalk, a passageway, an intersection, an entrance / exit to a building 1, a ticket gate or entrance / exit to a station, etc., and may also include people, vehicles, etc. The imaging device 100 may also capture infrared images if it is capable of acquiring infrared images. Note that information captured by the imaging device 100 may be used for digital twin computing.

[0026] Such an imaging device 100 can be used for a variety of purposes, and the applications are not limited thereto. The imaging device 100 can be used for a variety of purposes to capture images of a subject outside the window glass 11 of the building 1. Here, as an example, a configuration in which the imaging device 100 is used as a security surveillance camera will be described. The imaging device 100 is disposed facing the indoor main surface 11A of the window glass 11, and is therefore difficult to see from the outside of the window glass 11 due to reflection. For this reason, use as a surveillance camera is an example of a suitable application of the imaging device 100.

[0027] The height at which the imaging device 100 is attached to the window glass 11 is preferably higher than the height of an average person, from the viewpoint of providing a good view of the area to be monitored. For example, the height at which the imaging device 100 is attached to the window glass 11 is preferably 2 m or more, and the imaging device 100 may be attached to a window glass 11 on the second floor or higher of the building 1. If the imaging device 100 is attached to the window glass 11 at a height of 2 m or more, it is unlikely to be visible to the person to be monitored.

[0028] The height at which the imaging device 100 is attached to the window glass 11 may be set to a height at which an appropriate image can be captured, taking into consideration the imageable range depending on the angle of view of the imaging device 100, the distance to the subject, etc. The upper limit of the height at which the imaging device 100 is attached to the window glass 11 is the height of the top edge of the highest window glass 11 in the building 1. The height of the imaging device 100 may be defined as the height from a reference plane parallel to the horizontal plane (for example, the ground, floor, or virtual plane). The height of the imaging device 100 may also be the height of the lens 130.

[0029] <Detailed Configuration of Image Capturing Device 100> The detailed configuration of the image capturing device 100 will be described using Figures 2A to 2C in addition to Figures 1A and 1B. Figures 2A and 2B are diagrams showing an example of the configuration of the image capturing device 100. Figure 2C is a diagram showing an example of the configuration in a cross section taken along the arrows IIC-IIC in Figure 2B.

[0030] The imaging device 100 includes a case 110 , a magnet unit 120 , a lens 130 , and an imaging unit 140 .

[0031] <Case 110> The case 110 is a housing for the imaging device 100, and is a box-shaped housing that is triangular in plan view. In other words, the case 110 is a housing that is triangular in plan view and has a triangular prism shape with a low height in the Z-axis direction.

[0032] The case 110 may be made of resin or metal, for example. The resin material may be, for example, a thermoplastic resin. Examples of the thermoplastic resin include PC (polycarbonate) / ASA (Acrylate Styrene Acrylonitrile), ASA, or AES (Acrylonitrile Ethylene Styrene). Examples of the metal material may include aluminum, iron, stainless steel, etc.

[0033] The case 110 has, as surfaces exposed to the outside, a first surface 111, a second surface 112 (see particularly FIG. 2C ), and a side surface 113. Furthermore, as shown in FIG. 2C , the case 110 has an outer case 110A, an inner case 110B, an inner case 110C, and a holder 110D.

[0034] Hereinafter, when describing the positional relationship between the first surface 111, the second surface 112, and the side surfaces 113 (113A, 113B, and 113C), it may be expressed, for example, that the first surface 111 and the side surface 113A are connected. In this case, for example, even if the boundary between the outer case 110A and the inner case 110C is between the first surface 111 and the side surface 113A, and the first surface 111 and the side surface 113A are not physically connected, the first surface 111 and the side surface 113A are connected as long as they are connected in terms of the appearance of the case 110. In this way, the meaning of two surfaces being connected is the same for two surfaces other than the first surface 111 and the side surface 113A among the first surface 111, the second surface 112, and the side surfaces 113 (113A, 113B, and 113C).

[0035] <First Surface 111> The first surface 111 is located on the -Z axis direction side and is a surface parallel to the XY plane. The first surface 111 is an outer surface of the case 110 that faces the indoor-side main surface 11A of the window glass 11. As an example, the case 110 is arranged so that the first surface 111 is in direct contact with the indoor-side main surface 11A of the window glass 11. This is to reduce reflections of the window glass 11 in images acquired by the imaging unit 140 via the lens 130. However, the first surface 111 may be spaced apart from the main surface 11A.

[0036] As an example, the first surface 111 has a shape of a right-angled isosceles triangle in a plan view, and has a recess 111A recessed in the +Z axis direction in the center. The surface of the recess 111A is recessed in a mortar shape and has a circular ring shape in a plan view. Note that, as an example, a configuration in which the first surface 111 has a shape of a right-angled isosceles triangle in a plan view will be described here, but the first surface 111 may have a shape of a right triangle in which the two sides other than the hypotenuse have different lengths in a plan view, or may have a shape other than a right triangle. Furthermore, the recess 111A may be provided at a position offset from the center of the first surface 111 in a plan view.

[0037] The recess 111A has an opening 111A1 in the center in a plan view, for example. The opening 111A1 exposes a portion of the lens 130 and the holder 110D. As an example, the recess 111A has a depth recessed into the first surface 111 so that the lens 130 and the holder 110D do not protrude further toward the −Z axis direction than the first surface 111 in the Z axis direction. In other words, as an example, the recess 111A has a depth recessed into the first surface 111 so that the lens 130 and the holder 110D are recessed further toward the +Z axis direction (toward the second surface 112) than the first surface 111 in the Z axis direction. This is to prevent the lens 130 and the holder 110D from contacting the main surface 11A when the imaging device 100 is placed facing the main surface 11A of the window glass 11 so that the first surface 111 is in direct contact with the main surface 11A.

[0038] Furthermore, the recess 111A is tapered so that the opening diameter in a plan view increases with increasing distance from the opening 111A1 so as to prevent the recess 111A from entering the range of the angle of view determined by the lens 130 and the imaging unit 140. This is to prevent the recess 111A from appearing in an image captured by the imaging device 100. Furthermore, the orientation of the lens 130 is changeable with respect to the case 110. The recess 111A has a tapered shape that widens widely so as to prevent the recess 111A from appearing in an image even when the orientation of the lens 130 is changed so that the angle of the lens 130 with respect to the Z axis is maximized.

[0039] Note that, as one example, recess 111A may have a depth in the Z-axis direction that makes lens 130 and holder 110D flush with first surface 111, or may have a depth in the Z-axis direction that makes lens 130 and holder 110D protrude further toward the −Z-axis direction than first surface 111. For example, such a configuration may be used when imaging device 100 is disposed facing main surface 11A of window glass 11 so that first surface 111 is spaced apart from main surface 11A.

[0040] Furthermore, the opening 111A1 may be provided offset from the center of the recess 111A in a plan view.

[0041] <Second Surface 112> As shown in FIG. 2C in particular, the second surface 112 is a surface located opposite the first surface 111. For example, the second surface 112 has the shape of an isosceles right triangle that is identical in shape and size to the first surface 111. The second surface 112 is parallel to the XY plane. In a plan view, the second surface 112 is positioned such that two adjacent sides of the second surface 112 that form a right angle with the hypotenuse overlap with two adjacent sides of the first surface 111 that form a right angle with the hypotenuse. The two adjacent sides are the two sides of the right triangle that form a right angle with the hypotenuse, i.e., the two sides other than the hypotenuse of the right triangle. Hereinafter, the two adjacent sides of the right triangle refer to the two sides other than the hypotenuse of the right triangle. Note that the second surface 112 is not visible in FIGS. 1B, 2A, and 2B, but its position is indicated by a symbol.

[0042] <Side Surfaces 113> The side surfaces 113 are composed of three side surfaces 113A, 113B, and 113C. Hereinafter, when there is no need to distinguish between the three side surfaces 113A, 113B, and 113C, they will be simply referred to as side surfaces 113. The side surfaces 113A, 113B, and 113C connect the first surface 111 and the second surface 112 of the outer surfaces of the case 110.

[0043] <Side surface 113A> Side surface 113A is a surface parallel to the XZ plane that connects one of the two adjacent sides of first surface 111 that extends along the X axis to one of the two adjacent sides of second surface 112 that extends along the X axis. Side surface 113B is connected to the +X axis direction side of side surface 113A, and side surface 113C is connected to the −X axis direction side of side surface 113A.

[0044] The side surface 113A has an opening 113A1 in the center when viewed from the XZ plane, for example. One of the two magnet portions 120 is embedded in the side surface 113A, and the magnet portion 120 is exposed through the opening 113A1. The side surface 113A and the portion of the magnet portion 120 exposed through the opening 113A1 are, for example, flush with each other.

[0045] Here, embedding the magnet part 120 in the side surface 113A means that the magnet part 120 may be exposed from the opening 113A1 of the side surface 113A as shown in FIG. 2B, or the side surface 113A may not have the opening 113A1, and the magnet part 120 may be covered by the side surface 113A and positioned inside the case 110.

[0046] As an example, one magnet portion 120 is embedded in the center of the side surface 113A when viewed in the XZ plane, but the position of the magnet portion 120 may be offset from the center in either direction in the XZ plane.

[0047] Also, as an example, a notch 113A2 for passing cable 101 (see FIG. 1A) is provided at the end of side surface 113A on the −X axis direction side and the −Z axis direction side. Note that the position of notch 113A2 is not limited to the position shown in FIG. 2B. Also, side surface 113A does not necessarily have to have notch 113A2.

[0048] <Side surface 113B> Side surface 113B is oriented at an angle of 90 degrees to side surface 113A and is a surface parallel to the YZ plane. Side surface 113B connects one of two adjacent sides of first surface 111 that extends along the Y axis to one of two adjacent sides of second surface 112 that extends along the Y axis. Side surface 113A is connected to the +Y axis direction side of side surface 113B, and side surface 113C is connected to the −Y axis direction side of side surface 113B.

[0049] The side surface 113B has an opening 113B1 in the center when viewed in the YZ plane, for example. The other of the two magnet portions 120 is embedded in the side surface 113B, and the magnet portion 120 is exposed through the opening 113B1. The side surface 113B and the portion of the magnet portion 120 that is exposed through the opening 113B1 are, for example, flush with each other.

[0050] Here, embedding the magnet part 120 in the side surface 113B means that the magnet part 120 may be exposed from an opening 113B1 in the side surface 113B as shown in FIG. 2B, or the side surface 113B may not have an opening 113B1, and the magnet part 120 may be covered by the side surface 113B and positioned inside the case 110.

[0051] As an example, one magnet portion 120 is embedded in the center of the side surface 113B when viewed in the YZ plane, but the position of the magnet portion 120 may be offset from the center in either direction in the YZ plane.

[0052] Also, as an example, a notch 113B2 for passing the cable 101 (see FIG. 1A) is provided at the end of the side surface 113B on the -Y axis direction side and the -Z axis direction side. Note that the position of the notch 113B2 is not limited to the position shown in FIG. 2B. Also, the side surface 113B does not have to have the notch 113B2.

[0053] The case 110 may have either one of the notches 113A2 and 113B2 when the imaging device 100 is connected to the processing device via the cable 101. However, if the case 110 has both the notches 113A2 and 113B2, the direction in which the cable 101 is routed can be easily selected at the location where the imaging device 100 is installed.

[0054] <Side surface 113C> Side surface 113C is a surface that connects the hypotenuse of first surface 111 and the hypotenuse of second surface 112. Side surface 113C is a surface that forms a 45-degree angle with respect to the XZ plane and the YZ plane. Side surfaces 113A and 113B are connected to side surface 113C. In addition, notches 113A2 and 113B2 are located at the ends of side surface 113C that contact side surfaces 113A and 113B.

[0055] <Outer case 110A> The outer case 110A has a second surface 112, side surfaces 113A, 113B, and 113C, and an opening 110A1. The outer case 110A is a case formed of a thin wall extending along the second surface 112 and side surfaces 113A, 113B, and 113C of a triangular prism-shaped case 110 having a low height in the Z-axis direction. In other words, the outer case 110A is a triangular prism-shaped case having an opening 110A1 on one surface in the -Z-axis direction where the first surface 111 is located, and having an internal cavity. The inner case 110B, the inner case 110C, and the holder 110D are housed inside the outer case 110A.

[0056] <Inner case 110B> The inner case 110B is the case located at the innermost side of the outer case 110A when viewed from the opening 110A1. The inner case 110B is triangular in plan view and has a through-hole 110B1 that penetrates in the Z-axis direction at its center in plan view. An inner surface 110B2 surrounding the through-hole 110B1 has a shape that corresponds to the inner surface of the remaining portion of a hemispherical shell, excluding a portion of the apex.

[0057] <Inner case 110C> The inner case 110C is a case that is arranged inside the outer case 110A and closer to the front than the inner case 110B when viewed from the opening 110A1. The inner case 110C is arranged inside the outer case 110A in a state where it is stacked on top of the inner case 110B. The surface of the inner case 110C on the -Z axis direction side is the first surface 111.

[0058] The inner case 110C has a triangular shape in plan view and has a through-hole 110C1 that penetrates in the Z-axis direction at its center in plan view. The through-hole 110C1 has an opening 111A1 midway in the Z-axis direction. The opening 111A1 is the portion of the through-hole 110C1 between both ends in the Z-axis direction where the opening diameter is smallest in plan view. In other words, the opening 111A1 is the portion of the through-hole 110C1 between both ends in the Z-axis direction that protrudes most inward. The opening 111A1 is the portion that appears as an opening that exposes the holder 110D when the imaging device 100 is viewed from the -Z-axis direction (front direction) side.

[0059] The portion of through-hole 110C1 on the -Z-axis direction side of opening 111A1 is the internal space of recess 111A. Inner surface 110C2, which surrounds the portion of through-hole 110C1 on the +Z-axis direction side of opening 111A1, has a shape corresponding to the inner surface of the remaining portion of the hemispherical shell, excluding a portion on the apex side. Opening 111A1 is located on the apex side of this hemispherical shell. Inner surface 110C2 is in communication with inner surface 110B2 of inner case 110B, and has a shape corresponding to the inner surface of the remaining portion of the spherical shell, excluding the portions on the two apexes located on the Z-axis.

[0060] A magnet portion 120 is embedded in the side surfaces 113A and 113B of the case 110. FIG. 2C shows the magnet portion 120 embedded in the opening 113B1 of the side surface 113B of the outer case 110A. In practice, the magnet portion 120 is embedded in the outer case 110A and the inner cases 110B and 110C, as an example. Therefore, the inner cases 110B and 110C have openings that communicate with the opening 113B1 of the outer case 110A. The magnet portion 120 is embedded in the opening 113B1 of the outer case 110A and the openings of the inner cases 110B and 110C. This configuration is similar to that of the opening 113A1 of the side surface 113A of the outer case 110A, and the inner cases 110B and 110C also have openings that communicate with the opening 113A1.

[0061] <Holder 110D> The holder 110D is a hemispherical member and is disposed in a space defined by the inner surface 110C2 of the inner case 110C and the inner surface 110B2 of the inner case 110B. A recess 110D1 for accommodating the lens 130 is provided on the −Z axis direction side of the holder 110D. An opening is formed in the recess 110D1 at a portion that overlaps with the lens 130. The recess 110D1 is tapered so that the opening diameter in a plan view increases with increasing distance from the lens 130, so that the recess 110D1 does not fall within the range of the angle of view determined by the lens 130 and the imaging unit 140. This is to prevent the recess 110D1 from appearing in images captured by the imaging device 100.

[0062] Furthermore, a portion of holder 110D surrounding recess 110D1 is exposed to recess 111A through opening 111A1. Holder 110D also has a recessed accommodation portion 110D2 that accommodates imaging unit 140 on the back side (the +Z axis direction side in FIG. 2C ) of lens 130. Accommodation portion 110D2 communicates with recess 110D1 through the opening of recess 110D1.

[0063] Such holder 110D is configured to be rotatable relative to inner cases 110B and 110C along inner surfaces 110B2 and 110C2, thereby changing the orientation of lens 130. Note that case 110 does not necessarily have to have a configuration that allows the orientation of lens 130 to be changed in this way, and the orientation of lens 130 may be fixed.

[0064] <Magnet section 120> The magnet section 120 is, for example, a component in which a permanent magnet is covered with a magnetic metal, resin, or the like. The permanent magnet is preferably a magnet with a strong magnetic attraction force, such as a neodymium magnet. Examples of the magnetic metal that forms the portion covering the permanent magnet include iron and nickel, and examples of the resin material that forms the portion covering the permanent magnet include thermoplastic resins such as PC (polycarbonate) / ASA (Acrylate Styrene Acrylonitrile), ASA, or AES (Acrylonitrile Ethylene Styrene).

[0065] The imaging device 100 includes two magnet units 120. As shown in FIG. 2B , one magnet unit 120 is embedded in the center of the side surface 113A, and the other magnet unit 120 is embedded in the side surface 113B. As an example, the imaging device 100 is fixed to the window frame 12 by being magnetically attracted to the window frame 12 by the magnet unit 120 (see FIG. 2B ) as shown in FIG. 1B . If the window frame 12 is not made of a magnetic metal, for example, the imaging device 100 may be fixed to the window frame 12 by attaching a magnetic metal sheet to the window frame 12 and magnetically attracting the magnet unit 120. Alternatively, the imaging device 100 may be fixed to the window frame 12 by applying a paint containing a magnetic material (e.g., Magnet Paint (registered trademark) manufactured by Turner Color Co.) to the window frame 12 and magnetically attracting the magnet unit 120.

[0066] Also, as an example, a configuration will be described in which the imaging device 100 includes the magnet portion 120 and is magnetically attracted to the window frame 12 made of magnetic metal. However, for example, the case 110 may be made of magnetic metal, a sheet-like magnet portion 120 may be attached to the window frame 12, and the case 110 may be magnetically attracted to the sheet-like magnet portion 120 attached to the window frame 12, thereby fixing the imaging device 100 to the window frame 12.

[0067] Alternatively, the imaging device 100 may be attached to the window frame 12 using an adhesive such as double-sided tape instead of the magnet unit 120. In this case, the adhesive such as double-sided tape can be attached to a portion between the side surface 113A or 113B of the case 110 of the imaging device 100 and the window frame 12 that is not directly exposed to ultraviolet light. This is because even if the imaging device 100 is attached to the window frame 12 using an adhesive such as double-sided tape, deterioration due to ultraviolet light can be suppressed as long as the imaging device 100 is not directly exposed to ultraviolet light, and the imaging device 100 can be stably fixed to the window frame 12. Examples of double-sided tape include strong adhesive double-sided tape with an acrylic foam substrate (VHB Tape (registered trademark) manufactured by Sumitomo 3M Limited, HYPERJOINT (registered trademark) manufactured by Nitto Denko Corporation), and butyl tape having a substrate with a butyl rubber-based adhesive applied to both sides.

[0068] Additionally, while a form in which the imaging device 100 is fixed to the window frame 12 is described here as an example, the imaging device 100 may be fixed to a structure around the window glass 11 other than the window frame 12, such as the ceiling or wall around the window glass 11. If the ceiling or wall is not made of a magnetic metal, the imaging device 100 may be fixed to the ceiling or wall by attaching a magnetic metal sheet to the ceiling or wall. Alternatively, the case 110 may be made of a magnetic metal, and the imaging device 100 may be fixed to the ceiling or wall by attaching a sheet-like magnet portion 120 to the ceiling or wall. Alternatively, the imaging device 100 may be fixed to the ceiling or wall by attaching an adhesive such as double-sided tape to a portion between the ceiling or wall and the case 110 that is not directly irradiated with ultraviolet rays.

[0069] <Lens 130> The lens 130 is provided in the opening of the recess 110D1 of the holder 110D of the case 110. The opening of the recess 110D1 is connected to the storage section 110D2 on the back side of the recess 110D1, so the imaging section 140 provided in the storage section 110D2 can capture an image of the outdoor side of the window glass 11 through the opening of the recess 110D1 and the lens 130. Note that the lens 130 may also be provided on the second surface 112 so as to be able to capture an image of the indoor side as well as the outdoor side. Alternatively, the lens 130 may be provided only on the second surface 112 so as to be able to capture an image of only the indoor side.

[0070] <Image capture unit 140> The image capture unit 140 is a camera body capable of capturing moving and still digital images, and includes, for example, an image sensor that uses a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) as an imaging element. The camera body is the portion of the camera excluding the lens 130. In other words, the image capture unit 140 and the lens 130 constitute a digital camera.

[0071] The imaging unit 140 is fixed inside the accommodation portion 110D2 of the holder 110D. This is for capturing an image of a subject outside the window glass 11 through the lens 130. The imaging unit 140 may or may not have a telephoto function. If the imaging unit 140 does not have a telephoto function, an inexpensive imaging unit 140 will suffice, allowing the imaging device 100 to be manufactured at low cost. The imaging unit 140 is connected to the processing device via a cable 101 (see FIG. 1A).

[0072] 1B , a method of attaching the imaging device 100 to the window frame 12 will be described. As an example, at a corner portion on the +X-axis direction side and the +Y-axis direction side of the window frame 12, a frame portion 12X extending in the X-axis direction above the window glass 11 of the window frame 12 and a frame portion 12Y extending in the Y-axis direction on the +X-axis direction side of the window glass 11 form an angle of 90 degrees.

[0073] 1B , the imaging device 100 may be placed, for example, at the upper corners of the window glass 11 and window frame 12. This is because the upper corners of the window frame 12 are less visible to the general public when viewed from the outside and are less noticeable. Furthermore, the imaging device 100 can be mounted at a certain height to capture a wider range. However, the mounting position of the imaging device 100 is not limited to the upper corners of the window frame 12.

[0074] The main surface 11A of the window glass 11 has a side 11AX extending in the X-axis direction at its upper end and a side 11AY extending in the Y-axis direction on the +X-axis direction side. The sides 11AX and 11AY are connected to each other at a corner on the +X-axis direction side and the +Y-axis direction side of the main surface 11A, and the angle between the sides 11AX and 11AY is 90 degrees. In other words, the sides 11AX and 11AY are adjacent sides. Because the sides 11AX and 11AY are connected perpendicularly, the angle between the sides 11AX and 11AY and the frame portions 12X and 12Y of the window frame 12 that holds the window glass 11 is 90 degrees.

[0075] The imaging device 100 is fixed to the upper corner of the window frame 12 by bringing side surfaces 113A and 113B (see FIG. 2B ) of the case 110 into direct contact with the upper corner of the window frame 12 and magnetically attracting the magnet portion 120 to the window frame 12. The side surfaces 113A and 113B extend along the sides 11AX and 11AY, respectively. That is, the side surface 113A extends in the X-axis direction along the side 11AX, and the side surface 113B extends in the Y-axis direction along the side 11AY.

[0076] The angle between side surfaces 113A and 113B of case 110 of imaging device 100 is 90 degrees, allowing side surfaces 113A and 113B to come into direct contact with the inner corners of frame portions 12X and 12Y of window frame 12. Therefore, simply by pressing side surfaces 113A and 113B of imaging device 100 against the inner corners of frame portions 12X and 12Y of window frame 12, two magnet portions 120 of side surfaces 113A and 113B are magnetically attracted to frame portions 12X and 12Y. In this way, imaging device 100 can be easily attached to window frame 12.

[0077] Furthermore, the imaging device 100 has a triangular shape in a plan view and fits snugly into the inner corners of the frame portions 12X and 12Y of the window frame 12, so that the imaging device 100 appears to blend in with the window frame 12, resulting in good design.

[0078] <Surface Color of Recesses 110D1 and 111A of Case 110> Because the surfaces of the recesses 110D1 and 111A are located around the lens 130, it is preferable that they have low light reflectance. The surface color of the recesses 110D1 and 111A is preferably black, which absorbs light best, but may be a color other than black. As an example, the surfaces of the recesses 110D1 and 111A may be colored an appropriate color by applying paint. As an example, a paint that suppresses deterioration due to ultraviolet rays, such as a radical control paint, is preferable.

[0079] For example, the color of the surfaces of the recesses 110D1 and 111A may be any color with a brightness of not more than 5. The brightness represents the brightness defined by, for example, JIS Z8721-1993.

[0080] Because reflectance and brightness are correlated, a brightness of 5 or less corresponds to a reflectance of 20% or less. Reflectance represents total light reflectance as defined by JIS K7375:2008. If the reflectance of the surfaces of the recesses 110D1 and 111A is 20% or less, it is possible to prevent strong incident light, such as sunlight, from being unnecessarily reflected by the recesses 110D1 and 111A and entering the lens 130, thereby preventing deterioration in the quality of the captured image.

[0081] For this reason, use as a surveillance camera is one example of a suitable use of the imaging device 100. As a surveillance camera, when imaging outdoors, the imaging device 100 may be positioned in a position where the sun is backlighting it depending on the time of day and the installation location. Even in such cases, it is easy to obtain high-quality images that include the subject when capturing images of the outdoors being monitored.

[0082] There are no particular restrictions on the hue and saturation of the color of the surfaces of the recesses 110D1 and 111A, and any color may be used as long as its brightness is equal to or less than 5. Examples of colors with a brightness of equal to or less than 5 include dark gray, in addition to black.

[0083] In this way, the reflectance of the surfaces of recesses 110D1 and 111A is sufficiently low, so that even without using a member that suppresses reflection, such as a so-called lens hood, a sufficiently clear image can be obtained with image capture device 100. Furthermore, because lens hoods are often made of a material that is susceptible to deterioration due to ultraviolet rays, such as silicone rubber, image capture device 100 does not include a lens hood, which is advantageous in terms of preventing deterioration due to ultraviolet rays.

[0084] <Color of Case 110> Of the surface of case 110, the portion other than recesses 110D1 and 111A of first surface 111 is visible from outside through window glass 11, and therefore preferably has a color that is less noticeable, similar to recesses 110D1 and 111A. For example, when imaging device 100 is used as a surveillance camera, it is less likely to raise eyebrows if first surface 111 located in front of imaging device 100 is not visible from outside window glass 11.

[0085] Furthermore, since the side surface 113C of the case 110 is exposed when the imaging device 100 is fixed to the window frame 12, painting the case 110 the same color as or a color similar to the color of the window frame 12 makes the case 110 less noticeable, which is particularly effective when used as a surveillance camera. The side surfaces 113A and 113B are not visible when the imaging device 100 is fixed to the window frame 12. Therefore, the color of the side surfaces 113A and 113B is not particularly important, but painting them the same color as the side surface 113C enhances the design of the imaging device 100 when viewed alone and simplifies the painting of the side surfaces 113A to 113C. The color of the surface of the case 110 other than the recesses 110D1 and 111A on the first surface 111 is preferably black, which best absorbs light, but may be a color other than black. The surface of the case 110 preferably has a total light reflectance of 10% or more and 40% or less as specified in JIS K7375:2008. If the total light reflectance is 10% or more, heat is less likely to be generated in the case 110, so the temperature of the window glass 11 is less likely to rise and the window glass 11 is less likely to break. If the total light reflectance is 40% or less, the reflected image of the case 110 is less likely to be reflected in the window glass 11. The total light reflectance is more preferably 15% or more, and even more preferably 20% or more. The total light reflectance is more preferably 35% or less, and even more preferably 30% or less.

[0086] 3A to 3C are diagrams showing an example of the configuration of an imaging device 100M according to a modified example of the embodiment. FIG. 3A shows an example of an imaging device 100M installed inside a building 1. FIG. 3A shows a ceiling 1C of the building 1 and two walls 1WA and 1WB adjacent to the ceiling 1C and adjacent to each other. The two walls 1WA and 1WB are perpendicular to each other, the wall 1WA and the ceiling 1C are perpendicular to each other, and the wall 1WB and the ceiling 1C are perpendicular to each other. A windowpane 11 is provided on the wall 1WB. The windowpane 11 is held by a window frame 12 provided on the wall 1WB.

[0087] As shown in Fig. 3A, the imaging device 100M is placed in an upper corner of a room formed by two walls 1WA and 1WB and a ceiling 1C, with the lens 130 facing the interior of the room. Note that the window glass 11 and window frame 12 shown on the wall 1WB in Fig. 3A do not necessarily have to be provided.

[0088] Figure 3B shows an example of the configuration of the imaging device 100M viewed from the front side where the lens 130 is located, and Figure 3C shows an example of the configuration of the imaging device 100M viewed from the rear side opposite the front side where the lens 130 is located.

[0089] The imaging device 100M includes a case 110M, a magnet unit 120, a lens 130, and an imaging unit 140. The imaging unit 140 is not shown in Figures 3A to 3C. The imaging device 100M differs in the configuration of the case 110M from the configuration of the case 110 of the imaging device 100 shown in Figures 1A to 2C.

[0090] The case 110M has a triangular pyramid shape having a first surface 111 and three side surfaces 113AA, 113AB, and 113AC. The first surface 111 is similar to the first surface 111 of the case 110 of the image capture device 100 shown in FIGS. 1A to 2C. The case 110M does not have a second surface 112. Note that the second surface 112 may be omitted from the case 110 of the image capture device 100 shown in FIGS. 1A to 2C, and the triangular pyramid shape may be formed by the first surface 111 and the three side surfaces 113A to 113C.

[0091] As for the three side surfaces 113AA, 113AB, and 113AC, for example, the side surfaces 113AA and 113AB are perpendicular to each other, the side surfaces 113AA and 113AC are perpendicular to each other, and the side surfaces 113AB and 113AC are perpendicular to each other.

[0092] The two magnet units 120 are embedded in the side surfaces 113AA and 113AB, respectively. Therefore, for example, if magnetic metal sheets are attached to the two walls 1WA and 1WB, the imaging device 100M can be magnetically attracted to the upper corners of the room and fixed to the two walls 1WA and 1WB, as shown in FIG. 3A .

[0093] The imaging device 100M may include three magnet units 120, with a magnet unit 120 also embedded in the side surface 113AC. In this case, a magnetic metal sheet may be attached to the ceiling 1C. Alternatively, one of the two magnet units 120 may be embedded in the side surface 113AC, and the other may be embedded in either the side surface 113AA or 113AB. The imaging device 100M may include only one magnet unit 120, which may be embedded in either the side surface 113AA, 113AB, or 113AC.

[0094] 1A to 2C, the case 110M may be made of metal, and the sheet-like magnet portion 120 may be attached to any one of the two walls 1WA and 1WB and the ceiling 1C. Alternatively, any one of the first surface 111, the second surface 112, and the side surfaces 113AA, 113AB, and 113AC may be bonded to a corresponding one of the two walls 1WA and 1WB and the ceiling 1C with an adhesive such as double-sided tape.

[0095] Furthermore, although the imaging device 100M for capturing images of the indoor side has been described here, it may be configured to capture images of the outdoor side by providing a lens 130 on the side surface 113AA or the side surface 113AB, or it may be configured to capture images of both the indoor side and the outdoor side by providing a lens 130 on the first surface 111 and the side surface 113AA or the side surface 113AB.

[0096] <Effects> The imaging device 100 according to the embodiment described above includes a case 110 that is installed on the indoor side of a window glass 11 of a building, the case 110 having a first surface 111 that faces the indoor main surface 11A of the window glass 11 and a side surface 113 that is angled relative to the first surface 111, a fixing portion (magnet portion 120) that attracts or adheres the side surface 113 to a structure surrounding the window glass 11, a lens 130 provided on the first surface 111, and an imaging portion 140 that is disposed within the case 110 and is capable of capturing an image of the outdoor side of the window glass 11 via the lens 130. By attracting or adhering the side surface 113 to the structure surrounding the window glass 11 using the fixing portion (magnet portion 120) in this manner, it is possible to prevent ultraviolet rays from directly hitting the fixing portion, thereby suppressing deterioration of the fixing portion (magnet portion 120) due to ultraviolet rays.

[0097] Therefore, it is possible to provide the imaging device 100 that can be stably fixed to a structure around the window glass 11 for a long period of time. The imaging device 100 can be prevented from falling off, and the imaging device 100 can be stably fixed to a structure around the window glass 11 for a long period of time.

[0098] The fixing portion of the imaging device 100 may be a magnet portion 120 including a magnet that magnetically attracts the side surface 113 to a structure. Because the attraction force of the magnet portion 120 is semi-permanent, it is possible to provide an imaging device 100 that can be stably fixed to a structure around the window glass 11 for a longer period of time.

[0099] The magnet section 120 may also be embedded in the side surface 113 of the case 110. The magnet section 120 embedded in the side surface 113 makes it possible to easily and stably fix the imaging device 100 to a structure around the window glass 11.

[0100] The side surfaces 113 of the case 110 may be two side surfaces 113A and 113B extending along the two sides 11AX and 11AY of the main surface 11A of the window glass 11, and the magnet units 120 of the case 110 may be embedded in the two side surfaces 113A and 113B. The two magnet units 120 embedded in the two side surfaces 113A and 113B extending along the two sides 11AX and 11AY of the main surface 11A on the indoor side of the window glass 11 make it possible to provide an imaging device 100 that can be stably fixed to a structure around the window glass 11 extending along the two sides 11AX and 11AY.

[0101] Furthermore, the two sides 11AX, 11AY of the indoor-side main surface 11A of the window glass 11 may be adjacent to each other, and the two side surfaces 113A and 113B of the case 110 may extend along the two adjacent sides 11AX, 11AY of the main surface 11A. The imaging device 100 can be stably fixed to a structure around the window glass 11 extending along the two adjacent sides 11AX, 11AY by using two magnet portions 120 embedded in the two adjacent side surfaces 113A and 113B of the case 110 that extend along the two adjacent sides 11AX, 11AY of the indoor-side main surface 11A of the window glass 11.

[0102] The case 110 further has a second surface 112 located on the opposite side of the first surface 111, and the first surface 111 and the second surface 112 have the same right-angled triangular shape and are equal in size. The side surfaces 113 are three side surfaces 113A to 113C that respectively connect three sides of the right-angled triangle of the first surface 111 to three sides of the right-angled triangle of the second surface 112, and the magnet portion 120 may be embedded in two of the three side surfaces 113A to 113C, namely, two adjacent sides that sandwich the right-angled corner of the right-angled triangle of the first surface 111 and two adjacent sides that sandwich the right-angled corner of the right-angled triangle of the second surface 112, namely, side surfaces 113A and 113B. The imaging device 100 can be easily and stably fixed to the vertical corners of structures around the window glass 11, such as the window frame 12, using two magnet parts 120 embedded in two adjacent and perpendicular side surfaces 113A and 113B.

[0103] Alternatively, the case 110 may be made of metal, and the magnet unit 120 may be fixed to a structure. In a configuration in which the magnet unit 120 is not provided on the case 110 but is provided on the structure side, it is possible to provide an imaging device 100 that can be stably fixed to a structure around the window glass 11 for a long period of time. This makes it possible to prevent the imaging device 100 from falling off, and to stably fix the imaging device 100 to a structure around the window glass 11 for a long period of time.

[0104] Furthermore, case 110 may further have a recess 111A recessed from first surface 111, and lens 130 may be provided in recess 111A. With first surface 111 facing main surface 11A on the indoor side of window glass 11, lens 130 can be prevented from coming into contact with main surface 11A.

[0105] The surface of the recess 111A may be black in color. By absorbing light in the recess 111A, the reflectance can be reduced, and the imaging device 100 can be provided in which the lens 130 is less noticeable.

[0106] Furthermore, the reflectance of recess 111A may be 20% or less. By making the reflectance of recess 111A 20% or less, it is possible to prevent strong incident light, such as sunlight, from being unnecessarily reflected by recess 111A and entering lens 130, thereby preventing deterioration in the quality of the captured image.

[0107] The first surface 111 may be in direct contact with the main surface 11A of the window glass 11. By having the first surface 111 in direct contact with the main surface 11A, it is possible to reduce reflection of the window glass 11 in the image acquired by the imaging unit 140 via the lens 130.

[0108] The case 110 further has a second surface 112 located opposite the first surface 111, and the first surface 111 and the second surface 112 have the same right-angled triangular shape with the same size. The side surfaces are three side surfaces 113A to 113C that respectively connect three sides of the right-angled triangle of the first surface 111 with three sides of the right-angled triangle of the second surface 112. The magnet part 120 is located on the right-angled triangle of the first surface 111 among the three side surfaces 113A to 113C. The case 110 further includes a recess 111A recessed from the first surface 111, the lens 130 being provided in the recess 111A, the surface color of the recess 111A being black, and the reflectance of the recess 111A being 20% ​​or less. The first surface 111 may be in direct contact with the main surface of the window glass. The two magnets 120 embedded in the two adjacent and perpendicular side surfaces 113A and 113B allow the imaging device 100 to be easily and stably fixed to the vertical corners of a structure surrounding the window glass 11, such as a window frame 12. Furthermore, when the first surface 111 is facing the main surface 11A on the indoor side of the window glass 11, the lens 130 is prevented from contacting the main surface 11A. Furthermore, by absorbing light in recess 111A, it is possible to reduce reflectivity and provide imaging device 100 in which lens 130 is less noticeable. Furthermore, by making the reflectivity of recess 111A 20% or less, it is possible to prevent strong incident light, such as sunlight, from being unnecessarily reflected by recess 111A and entering lens 130, thereby preventing deterioration in the quality of the captured image.

[0109] The window glass 200 with an imaging device includes a window glass 11 of a building and an imaging device 100 provided on the indoor side of the window glass 11. The imaging device 100 includes a case 110 installed on the indoor side of the window glass 11, the case 110 having a first surface 111 facing the indoor main surface 11A of the window glass 11 and a side surface 113 angled relative to the first surface 111, a fixing portion that adsorbs or adheres the side surface 113 to structures surrounding the window glass 11, a lens 130 provided on the first surface 111, and an imaging unit 140 disposed within the case 110 and capable of capturing images of the outdoor side of the window glass 11 via the lens 130. By adsorbing or adhering the side surface 113 to the structures surrounding the window glass 11 with the fixing portion (magnet portion 120), direct exposure of the fixing portion to ultraviolet light can be prevented, thereby suppressing deterioration of the fixing portion (magnet portion 120) due to ultraviolet light.

[0110] Therefore, it is possible to provide the window glass 200 with an imaging device that can stably fix the imaging device 100 to a structure around the window glass 11 for a long period of time. Falling off of the imaging device 100 can be prevented, and the imaging device 100 can be stably fixed to a structure around the window glass 11 for a long period of time.

[0111] The window glass 200 with an imaging device may further include a window frame 12 that holds the window glass 11. In the window glass 200 with an imaging device including the window frame 12, the imaging device 100 can be stably fixed to a structure around the window glass 11 for a long period of time.

[0112] The structure may also be frame portions 12X and 12Y of the window frame 12. The imaging device 100 has a triangular shape in a plan view and fits snugly into the inner corners of the frame portions 12X and 12Y of the window frame 12, so that the imaging device 100 appears to blend in with the window frame 12, resulting in a favorable design.

[0113] Although exemplary imaging devices and window glass with imaging devices according to the present disclosure have been described above, the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and variations are possible without departing from the scope of the claims.

[0114] The following supplementary notes are further disclosed in relation to the above embodiments. (Supplementary Note 1) An imaging device including: a housing configured to be installed on the indoor side of a window glass of a building, the housing having a first surface configured to face the indoor main surface of the window glass and a side surface angled with respect to the first surface; a fixing unit configured to attach or adhere the side surface to a structure surrounding the window glass; a lens provided on the first surface; and an imaging unit disposed within the housing and configured to be able to capture an image of the outdoor side of the window glass via the lens. (Supplementary Note 2) The imaging device according to Supplementary Note 1, wherein the fixing unit is a magnet unit including a magnet configured to magnetically attach the side surface to the structure. (Supplementary Note 3) The imaging device according to Supplementary Note 2, wherein the magnet unit is embedded in the side surface of the housing. (Supplementary Note 4) The imaging device according to Supplementary Note 3, wherein the side surfaces are two side surfaces extending respectively along two sides of the main surface, and the magnet units are embedded in the two side surfaces. (Supplementary Note 5) The imaging device according to Supplementary Note 4, wherein the two sides of the main surface are adjacent to each other, and the two side surfaces extend along the two adjacent sides of the main surface, respectively. (Supplementary Note 6) The imaging device according to any one of Supplementary Notes 2 to 5, wherein the housing further has a second surface located opposite the first surface, the first surface and the second surface have the shape of a right-angled triangle of the same shape and equal size, the side surfaces are three side surfaces connecting three sides of the right-angled triangle on the first surface to three sides of the right-angled triangle on the second surface, respectively, and the magnet unit is embedded in two of the three side surfaces connecting two adjacent sides that sandwich a right-angled corner of the right-angled triangle on the first surface to two adjacent sides that sandwich the right-angled corner of the right-angled triangle on the second surface. (Supplementary Note 7) The imaging device according to Supplementary Note 2, wherein the housing is made of metal, and the magnet unit is configured to be fixed to the structure. (Supplementary Note 8) The imaging device according to any one of Supplementary Notes 1 to 7, wherein the housing further has a recess recessed from the first surface, and the lens is provided in the recess. (Supplementary Note 9) The imaging device according to Supplementary Note 8, wherein a surface of the recess is black.(Supplementary Note 10) The imaging device according to Supplementary Note 8 or 9, wherein the reflectance of the recess is 20% or less. (Supplementary Note 11) The imaging device according to any one of Supplementary Notes 1 to 10, wherein the first surface is configured to be in direct contact with the main surface of the window glass. (Supplementary Note 12) The imaging device described in Supplementary Note 5, wherein the housing further has a second surface located on the opposite side to the first surface, the first surface and the second surface have the same right-angled triangular shape and equal size, the side surfaces are three side surfaces respectively connecting three sides of the right-angled triangle on the first surface to three sides of the right-angled triangle on the second surface, the magnet portion is embedded in two of the three side surfaces connecting two adjacent sides that sandwich a right-angled corner of the right-angled triangle on the first surface to two adjacent sides that sandwich the right-angled corner of the right-angled triangle on the second surface, the housing further has a recess recessed from the first surface, the lens is provided in the recess, the color of the surface of the recess is black and the reflectance of the recess is 20% or less, and the first surface is configured to be in direct contact with the main surface of the window glass. (Supplementary Note 13) A window glass with an imaging device, comprising: a window glass of a building; and an imaging device provided on the indoor side of the window glass, wherein the imaging device comprises: a housing installed on the indoor side of the window glass, the housing having a first surface facing the indoor main surface of the window glass and a side surface angled with respect to the first surface; a fixing part for adhering or attaching the side surface to a structure surrounding the window glass by suction or adhesion; a lens provided on the first surface; and an imaging part disposed within the housing and capable of capturing an image of the outdoor side of the window glass via the lens. (Supplementary Note 14) The window glass with an imaging device according to Supplementary Note 13, further including a window frame that holds the window glass. (Supplementary Note 15) The window glass with an imaging device according to Supplementary Note 14, wherein the structure is the frame. The specification, claims, drawings and abstract of Japanese Patent Application No. 2023-132855, filed on August 17, 2023, are hereby incorporated by reference in their entirety as the disclosure of the present specification.

[0115] REFERENCE SIGNS LIST 11 window glass 11A main surface 11AX, 11AY sides (examples of two sides) 12 window frame 100 imaging device 110, 110M case 111 first surface 110D1 recess 111A recess 112 second surface 113, 113A, 113B, 113C, 113AA, 113AB, 113AC side surface 120 magnet section 130 lens 140 imaging section

Claims

1. An imaging device comprising: a housing configured to be installed on the indoor side of a window glass of a building, the housing having a first surface configured to face the indoor main surface of the window glass and a side surface angled with respect to the first surface; a fixing part configured to adhere or bond the side surface to a structure surrounding the window glass; a lens provided on the first surface; and an imaging part disposed within the housing and configured to be able to image the outdoor side of the window glass through the lens.

2. The imaging device according to claim 1, wherein the fixing portion is a magnet portion including a magnet configured to magnetically attract the side surface to the structure.

3. The imaging device according to claim 2, wherein the magnet portion is embedded in the side surface of the housing.

4. An imaging device as described in claim 3, wherein the side surfaces are two side surfaces respectively extending along two edges of the main surface, and the magnet portion is embedded in the two side surfaces.

5. An imaging device as described in claim 4, wherein the two sides of the main surface are adjacent to each other, and the two side surfaces each extend along the two adjacent sides of the main surface.

6. The imaging device described in claim 2, wherein the housing further has a second surface located opposite the first surface, the first surface and the second surface have the shape of a right-angled triangle of identical shape and equal size, the side surfaces are three side surfaces respectively connecting three sides of the right-angled triangle on the first surface to three sides of the right-angled triangle on the second surface, and the magnet portion is embedded in two of the three side surfaces connecting two adjacent sides that sandwich a right-angled corner of the right-angled triangle on the first surface to two adjacent sides that sandwich a right-angled corner of the right-angled triangle on the second surface.

7. The imaging device according to claim 2, wherein the housing is made of metal, and the magnet portion is configured to be fixed to the structure.

8. The imaging device according to claim 1, wherein the housing further has a recess recessed from the first surface, and the lens is provided in the recess.

9. The imaging device according to claim 8, wherein the surface of the recess is black in color.

10. The imaging device according to claim 8, wherein the reflectance of said recess is 20% or less.

11. The imaging device of claim 1, wherein the first surface is configured to directly contact the major surface of the window pane.

12. The imaging device of claim 5, wherein the housing further has a second surface located on the opposite side to the first surface, the first surface and the second surface have the shape of a right-angled triangle of the same shape and equal size, the side surfaces are three side surfaces respectively connecting three sides of the right-angled triangle on the first surface to three sides of the right-angled triangle on the second surface, the magnet portion is embedded in two of the three side surfaces connecting two adjacent sides that sandwich a right angle corner of the right-angled triangle on the first surface to two adjacent sides that sandwich the right angle corner of the right-angled triangle on the second surface, the housing further has a recess recessed from the first surface, the lens is provided in the recess, the color of the surface of the recess is black and the reflectance of the recess is 20% or less, and the first surface is configured to be in direct contact with the main surface of the window glass.

13. A window glass with an imaging device, comprising: a window glass of a building; and an imaging device provided on the indoor side of the window glass, wherein the imaging device has a housing installed on the indoor side of the window glass, the housing having a first surface facing the indoor main surface of the window glass and a side surface angled relative to the first surface, a fixing part for adhering or bonding the side surface to a structure surrounding the window glass, a lens provided on the first surface, and an imaging part disposed within the housing and capable of capturing an image of the outdoor side of the window glass via the lens.

14. The imaging window pane of claim 13, further comprising a frame that holds the window pane.

15. The window glass with an imaging device according to claim 14, wherein the structure is the frame portion.

Images