Imaging device

Abstract

To provide an imaging apparatus capable of reducing heat transfer to a lens unit, while transferring the heat of a heating element.SOLUTION: An imaging body 100 includes a heating element 20, a lens unit 10, a heat transfer body 30, and a first heat transfer plate 40. The heat transfer body 30 is interposed between the heating element 20 and the lens unit 10. The heat is transferred from the heating element 20 to the heat transfer body 30. The first heat transfer plate 40 is interposed between the lens unit 10 and the heat transfer body 30. The first heat transfer plate 40 comes into contact with the heat transfer body 30 on a side of one main surface 40a and comes into contact with the lens unit 10 on a side of the other main surface 40b. A first contact area between the first heat transfer plate 40 and the heat transfer body 30 is larger than a second contact area between the first heat transfer plate 40 and the lens unit 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to an imaging device, a display system, and a vehicle. [Background technology]

[0002] An imaging device including a heating element and a lens unit is known (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-64591 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to protect the imaging device, it is necessary to efficiently transfer the heat from the heat generating element to the outside of the imaging device.

[0005] An object of the present disclosure is to provide an imaging device, a display system, and a vehicle that efficiently transfer heat from a heat-generating body to the outside of the imaging device. [Means for solving the problem]

[0006] In one embodiment, (1) an imaging device includes a heating element, a lens unit, a heat transfer element interposed between the heating element and the lens unit and through which heat is transferred from the heating element, and a first heat transfer plate interposed between the lens unit and the heat transfer element and in contact with the heat transfer element on one main surface side and in contact with the lens unit on the other main surface side, wherein a first contact area between the first heat transfer plate and the heat transfer element is larger than a second contact area between the first heat transfer plate and the lens unit.

[0007] (2) The imaging device of (1) above can extend further outward than the lens unit when viewed in the normal direction of the main surface of the first heat transfer plate.

[0008] (3) In the imaging device of (1) or (2) above, the first heat transfer plate may include a concave portion or three or more second convex portions that contact the lens unit, or the lens unit may include three or more third convex portions that contact the first heat transfer plate.

[0009] (4) In any of the imaging devices (1) to (3) above, the first heat transfer plate may include a concave portion or three or more second convex portions that contact the lens unit, or the lens unit may include three or more third convex portions that contact the first heat transfer plate.

[0010] (5) In any of the imaging devices (1) to (4) above, the first heat transfer plate includes a fourth convex portion on the one main surface side, the fourth convex portion includes a through hole, and the heat transfer body can be in contact with the inner and outer surfaces of the fourth convex portion.

[0011] (6) In any of the imaging devices described in (1) to (5) above, the heat transfer body may include a first opening including the optical axis of the lens unit, and the first heat transfer plate may include a second opening including the optical axis of the lens unit.

[0012] (7) In the imaging device according to (6), the heat transfer body is an elastic solid body, The first heat transfer plate may be inclined toward the heating element in the vicinity of the second opening.

[0013] (8) In any of the imaging devices described in (1) to (7) above, the heat transfer body is an elastic solid, the first heat transfer plate includes a fifth convex portion on the one main surface side, and when viewed from an in-plane direction of the first heat transfer plate, the fifth convex portion may be asymmetric with respect to the normal to the first heat transfer plate.

[0014] (9) In any of the imaging devices (1) to (8) above, the first heat transfer plate includes a third opening including the optical axis of the lens unit, and the first heat transfer plate includes a sixth convex portion on the one main surface side, and the density of the sixth convex portions on the one main surface may increase with increasing distance from the third opening.

[0015] (10) Any of the imaging devices described in (1) to (9) above has a second heat transfer plate that surrounds the heating element from a direction intersecting with the optical axis of the lens unit, the second heat transfer plate being in direct or indirect contact with the first heat transfer plate, and the heating element being an electronic component.

[0016] In one embodiment, (11) a display system includes an imaging device according to any one of (1) to (10) and a display device that displays an image captured by the imaging device.

[0017] In one embodiment, (12) a vehicle includes an imaging device according to any one of (1) to (10). [Effects of the Invention]

[0018] The imaging device, display system, and vehicle according to the present disclosure configured as described above can efficiently transfer heat from the heat-generating body to the outside of the imaging device. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view of an imaging device according to a first embodiment. [Figure 2] 1 is a plan view of a display system and a vehicle according to a first embodiment. [Figure 3] FIG. 2 is an enlarged view of a region R in FIG. [Figure 4] FIG. 2 is a view of an example of a first heat transfer plate as viewed from the heat transfer body in FIG. [Figure 5] FIG. 2 is a view of another example of a first heat transfer plate as viewed from the heat transfer body in FIG. [Figure 6] 1. FIG. 4 is a view of a first heat transfer plate of yet another example as viewed from the heat transfer body in FIG. [Figure 7]10 is a partial enlarged view showing an example of a fourth protrusion of the imaging device according to the first embodiment. FIG. [Figure 8] 3 is a perspective view showing an example of a first heat transfer plate of the imaging device according to the first embodiment. FIG. [Figure 9] 4A and 4B are partial enlarged views showing examples of a recess and a second protrusion of the imaging device according to the first embodiment. [Figure 10] 4 is a partial enlarged view showing an example of a third convex portion of the imaging device according to the first embodiment. FIG. [Figure 11] FIG. 10 is a partially enlarged view of an imaging device according to another embodiment. [Figure 12] FIG. 10 is a partially enlarged view of an imaging device according to yet another embodiment. [Figure 13] FIG. 10 is a partially enlarged view of an imaging device according to yet another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of an imaging device to which the present disclosure is applied will be described with reference to the drawings.

[0021] FIG. 1 is a cross-sectional view of an imaging device according to the first embodiment. The imaging device 100 is, for example, an in-vehicle camera. The imaging device 100 may be mounted on a vehicle 300 (see FIG. 2) together with a display device 200. The imaging device 100 may be fixed to a side mirror or the like of the vehicle 300 in order to capture peripheral images of the rear field of view, for example. The display device 200 may be provided so as to be visible from the driver's seat. The imaging device 100 and the display device 200 may form a display system.

[0022] The imaging device 100 includes a lens unit 10, a heating element 20, a heat transfer element 30, and a heat transfer plate (first heat transfer plate) 40. The imaging device 100 may further include a second heat transfer plate 60.

[0023] In the following description, the direction parallel to the optical axis OA of the lens unit 10 in FIG. 1 and from the imaging device 100 toward the subject (the direction indicated by the arrow of the optical axis OA) will be referred to as the direction from "rear" to "front."

[0024] The lens unit 10 may include an imaging optical system 11 and a lens barrel 12 .

[0025] The imaging optical system 11 may form an image of a subject within an imaging field of view on the imaging element 21. The imaging optical system 11 may include at least one optical element. The imaging optical system 11 may be designed and formed to satisfy desired optical characteristics such as focal length and focal depth. The optical element may include a lens, a diaphragm, a mirror, etc.

[0026] The lens barrel 12 may be cylindrical. The lens barrel 12 may house the imaging optical system 11 in a holding hole 12h defined by the cylindrical inner surface. A circular holding portion 11s for fixing the imaging optical system 11 may be formed on the rear edge of the lens barrel 12. The lens barrel 12 may hold the imaging optical system 11 so that the optical axis OA of the imaging optical system 11 passes through the center of an opening 12o defined by the circular ring of the holding portion 11s. A light beam incident on the imaging optical system 11 may pass through the opening 12o. The lens barrel 12 may be made of a resin material.

[0027] The heating element 20 may be a structure that generates heat directly or indirectly when driven by the imaging device 100. The heating element 20 may include, for example, an electronic component 23 and a substrate 22 on which the electronic component 23 is mounted. The heating element 20 may include, for example, an imaging element 21. The mounting height of the electronic component 23 on the substrate 22 may differ depending on the type of electronic component 23.

[0028] The imaging element 21 may be disposed behind the lens unit 10. The imaging element 21 may capture an image of a subject formed on a light receiving surface via the lens unit 10, convert the image into an electrical signal, and output the electrical signal. The imaging element 21 may be, for example, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor. The imaging device 100 may transmit an image signal based on the electrical signal from the imaging element 21 to an external device such as a display device. The image signal may be the electrical signal output from the imaging element 21 itself, or may be a signal that has been subjected to necessary image processing by the electronic components 23.

[0029] The board 22 may have electronic components 23 mounted thereon. The board 22 may be a single board or multiple boards. By using multiple boards, the size constraints for accommodating the components inside the imaging device 100 can be easily met. The electronic components 23 may be components for driving the imaging element 21, processing image signals, etc.

[0030] The heat transfer body 30 is interposed between the heating body 20 and the lens unit 10. Heat is transferred from the heating body 20 to the heat transfer body 30. The heat transfer body 30 may include an opening (first opening) 30o. The heat transfer body 30 may be in contact with the heating body 20 at an end (inner peripheral surface) of the first opening 30o. The heat transfer body 30 is arranged in the imaging device 100 so that the optical axis OA of the imaging optical system 11 is positioned within the first opening 30o. A light beam incident on the imaging optical system 11 may pass through the first opening 30o. The heat transfer body 30 may be solid or liquid. The heat transfer body 30 may be an elastic solid. In the following description, unless otherwise specified, the heat transfer body 30 is an elastic solid. The heat transfer body 30 may be a highly thermally conductive resin such as a silicone resin. The heat transfer body 30 may be a carbon-based highly thermally conductive resin. By using a carbon-based highly thermally conductive resin for the heat transfer body 30, the thermal conductivity in the in-plane direction of the heat transfer body 30 can be made higher than the thermal conductivity in the thickness direction.

[0031] The heat transfer plate 40 is interposed between the lens unit 10 and the heat transfer body 30. The heat transfer plate 40 may be made of a material with higher thermal conductivity than the heat transfer body 30, and may include a metal such as aluminum, nickel silver, or copper. By using a metal for the heat transfer plate 40, electromagnetic interference can be reduced. By using a metal for the heat transfer plate 40, electromagnetic compatibility can be improved.

[0032] Alternatively, the heat transfer plate 40 may be made of a solid material having elasticity. The heat transfer plate 40 may be made of a highly thermally conductive resin such as a silicone resin. By molding the heat transfer plate 40 from resin, a heat transfer plate 40 having a complex shape can be easily manufactured.

[0033] The heat transfer plate 40 may have a main body portion 40m and a tip portion 40t. The tip portion 40t may be continuous with at least a portion of the outer edge of the main body portion 40m. The tip portion 40t may be formed by bending the main surface of the main body portion 40m in one direction. In this specification, the main surface means the surface having the largest area in a rectangular plate. As will be described later, the main body portion 40m may be provided with protrusions or recesses, and in a configuration including a surface on which protrusions and recesses are formed, the main surface means the surface having the largest area when the surface protrusions and recesses are macroscopically considered to be flat. The main body portion 40m may have an opening (second opening) 40o near the center.

[0034] The heat transfer plate 40 may be disposed in the imaging device 100 so that the main surface (e.g., the main surface 40b) of the main body 40m is perpendicular to the optical axis OA of the imaging optical system 11. The heat transfer plate 40 may be disposed in the imaging device 100 so that the tip 40t faces the lens unit 10.

[0035] The heat transfer plate 40 may extend outside the lens unit 10 when viewed from the direction along the optical axis OA within the imaging device 100. More specifically, at least a part of the outer edge of the main body 40m of the heat transfer plate 40 may extend outside the lens unit 10 within the imaging device 100. The second opening 40o of the heat transfer plate 40 may be coaxial with the first opening 30o of the heat transfer body 30 within the imaging device 100. With this configuration, a light beam incident on the imaging optical system 11 may pass through the second opening 40o.

[0036] The heat transfer plate 40 may be in contact with the heat transfer body 30 on one main surface 40a side. The heat transfer plate 40 is in contact with the lens unit 10 on the other main surface 40b side. More specifically, the heat transfer plate 40 may be in contact with the lens barrel 12 of the lens unit 10. A first contact area between the heat transfer plate 40 and the heat transfer body 30 is larger than a second contact area between the heat transfer plate 40 and the lens unit 10. Below, a specific configuration in which the heat transfer plate 40 is in contact with the heat transfer body 30 and the lens unit 10 will be described, along with a specific structure of the heat transfer plate 40.

[0037] FIG. 3 is an enlarged view of region R in FIG. 1. Region R is a portion of the cross section of imaging device 100. Region R includes a portion of the rear edge of lens barrel 12, heat transfer plate 40, heat transfer body 30, and heating element (electronic component) 23. As shown in FIGS. 3 and 4, heat transfer plate 40 may include first convex portions 41 on one main surface 40a. First convex portions 41 may be protruding. Alternatively, first convex portions 41 may be linear ridge-like as shown in FIG. 5. Alternatively, first convex portions 41 may be ring-shaped ridge-like as shown in FIG. 6.

[0038] In a configuration in which the first protrusions 41 are protruding, the heat transfer plate 40 may include three or more first protrusions 41. The three or more first protrusions do not have to be aligned in the same line. The first protrusions 41 may be hemispherical. The first protrusions 41 may be conical or polygonal pyramidal, with an axis perpendicular to the main surfaces 40a and 40b. The first protrusions 41 may be semicylindrical or polygonal prism-shaped, with an axis parallel to the main surfaces 40a and 40b. It is preferable that the edges of the first protrusions 41 be gently curved. In other words, the first protrusions 41 and the remaining portions of the heat transfer plate 40 may smoothly transition from each other. In this configuration, the gap between the heat transfer plate 40 and the heat transfer body 30 can be reduced.

[0039] In a configuration in which the first protrusions 41 are protruding, the heights of the multiple first protrusions 41, in other words, the lengths in the normal direction of the main surface (one of the main surfaces 40a), may be different. The height of the first protrusions 41 may vary depending on the distance between the heating element 20 and the heat transfer plate 40, which face each other via the heat transfer element 30. More specifically, the greater the distance, the higher the first protrusions 41 may become. With this configuration, the heat transfer element 30 pressed by the first protrusions 41 deforms depending on the height of the first protrusions 41, and the protrusion height of the heat transfer element 30 protruding on the opposite side from the first protrusions can change.

[0040] As shown in FIG. 7 , the first convex portion 41 may include a through hole 44h penetrating from one main surface 40a side to the other main surface 40b side. In other words, the heat transfer plate 40 may have a fourth convex portion 44 in which the through hole 44h is formed. The heat transfer body 30 may enter inside the through hole 44h. The heat transfer body 30 may be in contact with the inner circumferential surface and the outer circumferential surface of the fourth convex portion 44. The total contact area of ​​the inner circumferential surface and the outer circumferential surface of the heat transfer body 30 may be larger than the area of ​​the through hole 44h. In other words, the formation of the through hole 44h may increase the contact area between the heat transfer body 30 and the fourth convex portion 44. The heat transfer body 30 does not need to contact the lens unit 10. When manufacturing the imaging device of this embodiment, the fourth protrusion 44 of the heat transfer plate 40 may be pressed against the heat transfer body 30 so that the heat transfer body 30 wraps around the inner circumferential surface of the fourth protrusion 44.

[0041] 8, in a configuration in which the first protrusions 41 are ridge-shaped, the first protrusions 41 having the through-holes 44h may be slit-shaped overall. When manufacturing the imaging device of this embodiment, the first protrusions 41 of the heat transfer plate 40 may be pressed against the heat transfer body 30, so that the heat transfer body 30 fits into the slits.

[0042] The heat transfer plate 40 or the lens unit 10 may be formed so that the contact area between the heat transfer plate 40 and the lens unit 10 is reduced on the other main surface 40b side. For example, as shown in FIG. 3, the heat transfer plate 40 may include a recess 42 on the other main surface 40b side. Alternatively, as shown in FIG. 9, the heat transfer plate 40 may include three or more second convex portions 43 on the other main surface 40b side. The three or more second convex portions 43 do not have to be aligned in the same line. Alternatively, instead of providing the recess 42 or the second convex portions 43 on the heat transfer plate, the lens unit 10 may include three or more third convex portions 13 that contact the heat transfer plate 40, as shown in FIG. 10. The three or more third convex portions 13 do not have to be aligned in the same line. The number of both the second convex portions 43 and the third convex portions 13 may be three or more in total.

[0043] As shown in FIG. 1 , a portion of the heat transfer plate 40 near the second opening 40o may be inclined toward one of the main surfaces 40a. Therefore, a portion of the heat transfer plate 40 near the second opening 40o may be inclined toward the heating element 20 within the imaging device 100. For example, the periphery of the second opening 40o of the heat transfer plate 40 may be bent to form an inclined portion 40i inclined toward the heating element 20. In the above-described configuration in which the heat transfer element 30 is an elastic solid, the heat transfer element 30 may be deformed to match the shape of the heat transfer plate 40 by pressing the heat transfer element 30. The heat transfer element 30 may also be inclined toward the heating element 20 near the second opening 40o.

[0044] The angle θ of the inclined portion 40i with respect to the optical axis OA of the lens unit 10 may be larger than the angle of incidence of light rays that pass through the edge of the aperture of the optical system and enter the image sensor 21. With this configuration, the light rays that pass through the edge of the aperture of the optical system and enter the image sensor 21 can reach the image sensor 21 without being blocked by the heat transfer plate 40 or the heat transfer body 30.

[0045] As shown in FIG. 11 , when viewed in the in-plane direction of the heat transfer plate 40 (the direction perpendicular to the plane of FIG. 11 ), the first convex portion 41 may be asymmetric with respect to the normal line l of the heat transfer plate 40. In other words, the heat transfer plate 40 may have a first convex portion (fifth convex portion) 41 that is asymmetric with respect to the normal line l of the heat transfer plate 40. The cross-sectional shape of the first convex portion 41 may be a right-angled triangle. One side of the right-angled triangle may include the normal line l. The other side of the right-angled triangle may be a hypotenuse that is closer to the imaging element 21 than the normal line l. The imaging element 21 may abut against the heat transfer body 30 in the in-plane direction of the heat transfer body 30. With this configuration, the first convex portion 41 is pressed by the imaging element 21 via the heat transfer body 30, and therefore the first convex portion 41 can generate a large elastic repulsive force. Therefore, the image pickup element 21 and the heat transfer body 30 are in closer contact with each other, and the heat of the image pickup element 21 can be transferred to the heat transfer body 30 more easily.

[0046] As shown in FIG. 12 , on one principal surface 40a, the density of the first convex portions (sixth convex portions) 41 may increase with increasing distance from the opening (third opening) 40о of the heat transfer plate 40. For example, as shown in FIGS. 4 to 6 , the first convex portions 41 may be sparsely arranged in a first region 40f near the opening 40о. The first convex portions 41 may be more densely arranged in a second region 40s away from the third opening 40о than in the first region 40f. With this configuration, the pressure from the first convex portions 41 to the heat transfer body 30 is weaker near the opening 40о, reducing the in-plane expansion of the heat transfer body 30. Therefore, light rays passing through the edge of the optical system aperture and incident on the image sensor 21 may be less likely to be blocked by the heat transfer body 30. Meanwhile, the contact area between the heat transfer body 30 and the first convex portions 41 of the heat transfer plate 40 may be larger in regions away from the opening 40о. Therefore, the heat of the heat transfer body 30 can be efficiently transferred to the heat transfer plate 40 .

[0047] Alternatively, the first protrusions 41 may be densely arranged in the first region 40f. The first protrusions 41 may be sparsely arranged in the second region 40s than in the first region 40f. With this configuration, the contact area between the heat transfer body 30 and the first protrusions 41 of the heat transfer plate 40 can be increased near the opening 40о. Therefore, heat from the heat transfer body 30 can be efficiently transferred to the heat transfer plate 40 near the heating body 20.

[0048] As shown in FIG. 1 , the second heat transfer plate 60 may be in direct or indirect contact with the first heat transfer plate 40. The second heat transfer plate 60 may surround the electronic component (heat-generating element) 23 from a direction intersecting the optical axis OA of the lens unit 10. For example, the second heat transfer plate 60 may surround the electronic component 23 from a direction perpendicular to the optical axis OA of the lens unit 10. In other words, the second heat transfer plate 60 may surround the electronic component 23 around an axis parallel to the direction perpendicular to the optical axis OA of the lens unit 10. The second heat transfer plate 60 may have a rectangular tubular or cylindrical shape. Alternatively, the second heat transfer plate 60 may surround the electronic component 23 together with the first heat transfer plate 40.

[0049] The second heat transfer plate 60 may have a main body portion 60m and a contact portion 60t. The contact portion 60t may be continuous with the main body portion 60m at the rear end portion of the imaging device 100. The contact portion 60t may be formed by bending the main surface of the main body portion 60m to one side.

[0050] The second heat transfer plate 60 may be disposed in the imaging device 100 so that the main surface of the main body 60m is parallel to the optical axis OA of the imaging optical system 11. In the imaging device 100, the main body 60m may extend rearward from the heat transfer plate 40. With this configuration, heat from the heating element 20 can be transferred in a direction away from the lens unit 10.

[0051] The main body 60m may be fixed to the housing 80 of the imaging device 100 by an adhesive. The adhesive may be a thermally conductive material.

[0052] The contact portion 60t may be attached to an internal heat transfer member 70. The internal heat transfer member 70 may be disposed on the rear side of the imaging device 100. The internal heat transfer member 70 may have heat conductivity and insulating properties. The internal heat transfer member 70 may be realized by, for example, a heat transfer sheet or heat transfer potting made of silicone, but is not limited to these.

[0053] The second heat transfer plate 60 may be in contact with the tip end 40t of the heat transfer plate 40. Specifically, the main body 60m of the second heat transfer plate 60 may be in contact with the tip end 40t of the heat transfer plate 40. At least a portion of the contact between the second heat transfer plate 60 and the tip end 40t may be via a thermally conductive material. The thermally conductive material may improve the contact or heat transfer between the second heat transfer plate 60 and the tip end 40t. The thermally conductive material may be solid or liquid.

[0054] 13, the end of the tip portion 40t of the heat transfer plate 40 may be positioned in the recess 80r of the housing 80 together with the end of the contact portion 60t of the second heat transfer plate 60. Alternatively, the end of the tip portion 40t of the heat transfer plate 40 may be positioned in the recess of the lens barrel 12. The recess may be positioned on the heat transfer plate 40 side of the housing 80. The recess may be filled with a thermally conductive material. The thermally conductive material may be a highly thermally conductive resin.

[0055] The imaging device 100 of this embodiment includes a heat transfer member 30 that is interposed between the heating element 20 and the lens unit 10 and to which heat is transferred from the heating element 20, and a heat transfer plate that is interposed between the lens unit 10 and the heat transfer member 30 and that is in contact with the heat transfer member 30 on one main surface side and in contact with the lens unit 10 on the other main surface side, wherein a first contact area between the heat transfer member 30 and the heat transfer member 30 is larger than a second contact area between the heat transfer member 40 and the lens unit 10. With this configuration, the imaging device 100 can transfer heat from the heating element 20 to the heat transfer plate 40 via the heat transfer member 30 while reducing heat transfer to the lens unit 10.

[0056] Typically, imaging devices mounted on vehicles are often housed in narrow, space-saving spaces such as side mirrors, where heat builds up. Furthermore, due to the external environmental temperature, imaging devices are required to operate stably even at extremely high temperatures. Furthermore, imaging devices for perimeter monitoring applications require a wide angle of view, which generally leads to a short focal length. This inevitably leads to a low profile, which can lead to poor heat dissipation. Furthermore, in vehicle imaging devices, the objective lens surface of the imaging device is easily cooled by wind, rain, snow, etc., and water vapor in the void space of the cooled lens can condense on the lens surface, resulting in poor visibility. This condensation phenomenon generally occurs more easily the higher the temperature of the objective lens surface. Therefore, efficient heat transfer from the heat-generating element and reduced heat transfer to the lens unit are required. The imaging device 100 with the above-described configuration is effective in configurations installed in space-saving spaces such as vehicle side mirrors.

[0057] In the imaging device 100 of this embodiment, the heat transfer plate 40 extends outside the lens unit 10 when viewed from the direction of the normal 1 to a main surface (for example, the other main surface 4b) of the heat transfer plate 40. With this configuration, the imaging device 100 can transmit heat transferred to the heat transfer plate 40 to a space or object outside the lens unit 10.

[0058] The imaging device 100 of this embodiment has a second heat transfer plate 60 that surrounds the heat generating element from a direction intersecting with the optical axis OA of the lens unit 10, the second heat transfer plate 60 being in direct or indirect contact with the first heat transfer plate 40, and the heat generating element being an electronic component 23. In this configuration, by using a metal for the first heat transfer plate 40 or the second heat transfer plate 60, electromagnetic interference or electromagnetic compatibility can be improved.

[0059] Although the present invention has been described based on the drawings and examples, it should be noted that various modifications and alterations can be easily made by those skilled in the art based on the present disclosure, and therefore, it should be noted that these modifications and alterations are included within the scope of the present invention. [Explanation of symbols]

[0060] 100 Imaging device 10 Lens unit 11 Imaging optical system 11s holding part 12 Lens barrel 12r recess 12o opening 12h holding hole 13 Third convex part 20 Heating element 21 Image sensor 22 PCB 23 Electronic Components 30 Heat Transfer Material 30o 1st opening 40 Heat transfer plate 40о Second opening, third opening 40a, 40b main surface 40i slope section 40m main body 40t tip 41 First convex part, fifth convex part 42 recess 43 Second convex part 44 4th convex part 44h through hole 45 Slit 60 Second heat transfer plate 60t contact part 60m main body 70 Internal heat transfer member 80 cabinets 200 Display device 300 vehicles OA optical axis R region l normal θ angle

Claims

1. A heating element; A lens unit; a heat transfer body that is interposed between the heating body and the lens unit and transfers heat from the heating body; a first heat transfer plate interposed between the lens unit and the heat transfer body, one main surface of the first heat transfer plate being in contact with the heat transfer body and the other main surface of the first heat transfer plate being in contact with the lens unit; Equipped with the first heat transfer plate includes a first protrusion, the first heat transfer plate has a main surface that is in contact with the heat transfer body and a main surface that is not in contact with the lens unit at a location where the first convex portion is formed; a first contact area between the first heat transfer plate and the heat transfer body is larger than a second contact area between the first heat transfer plate and the lens unit; Imaging device.

2. The imaging device according to claim 1 , wherein the first heat transfer plate extends outward beyond the lens unit when viewed in a normal direction of a main surface of the first heat transfer plate.

3. The first convex portion has a hemispherical, conical, semi-cylindrical, polygonal prism or polygonal pyramid shape.

3. The imaging device according to claim 1.

4. The first heat transfer plate includes a second convex portion in contact with the lens unit, or the lens unit includes a third convex portion in contact with the first heat transfer plate.

3. The imaging device according to claim 1.

5. The second protrusion protrudes in the opposite direction to the first protrusion. The imaging device according to claim 4 .

6. The first heat transfer plate includes a fourth protrusion on the one main surface side, the fourth protrusion including a through hole, and the heat transfer body contacts an inner peripheral surface and an outer peripheral surface of the fourth protrusion.

3. The imaging device according to claim 1.

7. the heat transfer body includes a first opening including an optical axis of the lens unit; the first heat transfer plate includes a second opening including the optical axis of the lens unit; 3. The imaging device according to claim 1.

8. the heat transfer body is an elastic solid body, The imaging device according to claim 7 , wherein the first heat transfer plate is inclined toward the heating element in the vicinity of the second opening.

9. the heat transfer body is an elastic solid body, the first heat transfer plate includes a fifth convex portion on the one main surface side, When viewed from an in-plane direction of the first heat transfer plate, the fifth convex portion is asymmetric with respect to a normal to the first heat transfer plate.

3. The imaging device according to claim 1.

10. the first heat transfer plate includes a third opening including an optical axis of the lens unit; the first heat transfer plate includes a sixth convex portion on the one main surface side, On the one main surface, the density of the sixth convex portions increases with increasing distance from the third opening.

3. The imaging device according to claim 1.

11. a second heat transfer plate that surrounds the heating element in a direction intersecting with the optical axis of the lens unit; The second heat transfer plate is in direct or indirect contact with the first heat transfer plate, The heating element is an electronic component.

3. The imaging device according to claim 1.

Images