CN116552450A

CN116552450A - Holding device and vehicle

Info

Publication number: CN116552450A
Application number: CN202211577836.9A
Authority: CN
Inventors: 真取忠弘
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2022-02-04
Filing date: 2022-12-06
Publication date: 2023-08-08
Also published as: JP7345000B2; JP2023114295A

Abstract

The present invention relates to a holding device and a vehicle, and provides a technique advantageous in terms of defogging performance of a window member of the vehicle. In the present invention, the camera is supported by a bracket fixed to a vehicle inner surface of a window member constituting a vehicle front window in such a manner as to be directed from the vehicle interior through the window member to capture an image of the front of the vehicle. In the bracket, a heater for heating a region of the window member within a field of view of the camera is disposed. The bracket has a bottom wall portion extending to the window member at a position lower than the optical axis of the lens on the vehicle front side with respect to the lens of the camera, the bottom wall portion having a first surface on the window member side and a second surface on the opposite side from the first surface, the heater being attached to the second surface, a groove portion being formed on the second surface so that a space is formed between a front end portion on the vehicle front side of the heater and the bottom wall portion, and an opening communicating the groove portion formed on the second surface and the first surface being formed on the bottom wall portion.

Description

Holding device and vehicle

Technical Field

The present invention relates to a holding device and a vehicle.

Background

An imaging device (camera) used for automatic driving, advanced driving assistance, or driving recording is provided on the vehicle inner side of a windshield of a vehicle. A camera provided in the vehicle photographs the front of the vehicle through a front window glass.

Since there is a possibility that the front window glass may be fogged due to a temperature difference between the inside and the outside of the vehicle, it is necessary to suppress such fogging so as not to interfere with the imaging performance of the camera. Patent document 1 describes a structure in which a region of a front window glass in an imaging range of a camera is heated by a hot wire to remove fog.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2017-213981

Disclosure of Invention

Problems to be solved by the invention

However, in the configuration of patent document 1, there is a risk of degradation in shooting performance because the hot wire enters the field of view of the camera. In addition, there is a problem that it is difficult to remove the mist in the region between the heating wire and the heating wire due to the low thermal conductivity of the glass.

On the other hand, a configuration may be considered in which a heater is disposed in a bracket for supporting a camera, without using a hot wire, to heat air between the bracket and the windshield. For example, a heater is disposed at a bracket portion extending below the camera view space. When the air is heated by the heater, an upward air flow can be formed in the camera view space, and the air flow is caused to impinge on the windshield glass, thereby removing the fog.

However, in this type of structure, the heater cannot be provided so as to cover the entire region of the front window glass in the field of view of the camera, in terms of constraints of the fixing structure of the bracket. Therefore, there is a possibility that an area (particularly, an area on the vehicle front side) where the front window glass in the camera view cannot be impacted by the updraft is generated, and the defogging performance in the area is lowered.

The present invention provides a technique that is advantageous in terms of defogging performance of a window member.

Means for solving the problems

According to one aspect of the present invention, there is provided a holding device for holding a camera for a vehicle, the holding device including: a bracket fixed to a vehicle-interior surface of a window member that forms a front window of a vehicle, the bracket supporting the camera in an orientation in which the camera is transmitted through the window member from within the vehicle to capture a front image of the vehicle; and a heater disposed on the bracket for heating a region of the window member within a visual field of the camera, wherein the bracket has a bottom wall portion extending to the window member at a position lower than an optical axis of the lens on a vehicle front side with respect to the lens of the camera, the bottom wall portion has a first surface on the window member side and a second surface on a side opposite to the first surface, the heater is adhered to the second surface of the bottom wall portion, a groove portion is formed on the second surface of the bottom wall portion so that a space is formed between a front end portion on the vehicle front side of the heater and the bottom wall portion, and an opening communicating the groove portion formed on the second surface with the first surface of the bottom wall portion is formed on the bottom wall portion.

According to other aspects of the present invention, there is provided a vehicle characterized by having: a window member that constitutes a front window; a camera for shooting outside the vehicle; a bracket fixed to a vehicle-interior surface of the window member, the bracket supporting the camera in an orientation in which the camera is transmitted through the window member from within the vehicle to capture a front image of the vehicle; and a heater disposed on the bracket for heating a region of the window member within a visual field of the camera, wherein the bracket has a bottom wall portion extending to the window member at a position lower than an optical axis of the lens on a vehicle front side with respect to the lens of the camera, the bottom wall portion has a first surface on the window member side and a second surface on a side opposite to the first surface, the heater is adhered to the second surface of the bottom wall portion, a groove portion is formed on the second surface of the bottom wall portion so that a space is formed between a front end portion on the vehicle front side of the heater and the bottom wall portion, and an opening communicating the groove portion formed on the second surface with the first surface of the bottom wall portion is formed on the bottom wall portion.

Effects of the invention

According to the present invention, a technique advantageous in terms of defogging performance of a window member can be provided.

Drawings

Fig. 1 is a left side view of a main portion of a vehicle.

Fig. 2 is a left side view showing a structure of the holding device including a part of a cross section of the periphery of the camera.

Fig. 3 is a perspective view of the periphery of the camera showing the structure of the holding device.

Fig. 4 is a plan view of the bracket supporting the camera as seen from the front side.

Fig. 5 is a plan view of the bracket supporting the camera as seen from the back side.

Fig. 6 is a plan view of the camera in a state of being removed, as seen from the back side of the bracket.

Fig. 7 is a plan view of the split body in a state of being removed, as seen from the back surface side of the bracket.

Fig. 8 is an enlarged view of a partial region of fig. 2, and is a view showing an example of a bottom wall portion having a groove portion and an opening.

Fig. 9 is an enlarged view of a partial region in fig. 2, and is a view showing an example in which a heat conductive member is provided in the groove portion and the opening.

Fig. 10 is a diagram showing a modification of fig. 7.

Description of the reference numerals

H: a heater; 3: a front window glass; 10: a camera; 10A: a holding device; 20: a bracket; 21: a lens cover; 26: a bottom wall portion; 51: an opening; 52: a groove portion.

Detailed Description

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The following embodiments are not intended to limit the invention according to the technical aspects, and the combination of features described in the embodiments is not necessarily essential to the invention. Two or more of the features described in the embodiments may be arbitrarily combined. The same or similar components are denoted by the same reference numerals, and redundant description thereof is omitted.

Fig. 1 is a left side view of a main portion of a vehicle 1 as a transport apparatus according to an embodiment. In the drawings, "FR" indicates the front of the vehicle 1, "LH" indicates the left of the vehicle 1, and "UP" indicates the upper of the vehicle 1. The vehicle 1 is, for example, a four-wheel vehicle, and has a front window 2 formed in a front portion of a vehicle cabin CA (in-vehicle space). The front window 2 is constituted by a front window glass 3 as a window member. The vehicle 1 further includes a side window 4 formed in a side portion of the vehicle cabin CA. The side window 4 is constituted by side window glass 5. The side window glass 5 can be supported so as to be accommodated in a side door. The vehicle 1 further includes a roof 6 that forms an upper portion of the vehicle cabin CA.

A camera 10 that photographs the front of the vehicle from the vehicle cabin CA through the front window glass 3 is provided on the inner surface 3a (see fig. 2) side (vehicle cabin CA side) of the upper portion and the left and right central portions of the front window glass 3. In the present embodiment, the window member constituting the front window 2 is the front window glass 3, but may be a member other than glass as long as it has a property of transmitting light detected by the camera 10. The camera 10 is an image pickup device including an image pickup element such as a CCD or CMOS, for example. The camera 10 is a camera for capturing images outside a vehicle, which is used for automatic driving, advanced driving assistance, driving records, or the like. The camera 10 may be a camera that captures not only visible light but also invisible light such as infrared light.

Fig. 2 to 5 show a configuration example of a holding device 10A for holding the camera 10. Fig. 2 is a left side view of a portion of the vehicle 1 including the periphery of the camera 10, fig. 3 is a perspective view of the periphery of the camera 10 showing the structure of the holding device 10A, fig. 4 is a plan view of the bracket 20 supporting the camera 10 seen from the front side (the bottom front surface 26a side of the bottom wall 26 described later), and fig. 5 is a plan view of the bracket 20 supporting the camera 10 seen from the back side (the bottom back surface 26b side of the bottom wall 26 described later). A cover that covers the periphery of the camera 10 from the vehicle cabin side may be attached, but such a cover is not shown.

As shown in fig. 2, the camera 10 may include a camera body 11, and a lens portion 12 disposed above a rear portion of the camera body 11. The camera body 11 may have an imaging element, an a/D converter, an image processing section, a storage section, a system control section, and the like. The lens unit 12 includes at least one lens, and is arranged such that the lens front surface 12a faces the vehicle front in the imaging direction, and the optical axis CL1, which is the central axis of the lens, is substantially horizontal. Arrow F1 indicates the shooting direction along the optical axis CL 1. The camera 10 is configured to be substantially laterally symmetrical with respect to the optical axis CL1 in appearance.

A bracket 20 for supporting the camera 10 is fixed to the inner surface 3a of the front window 3 inclined rearward and upward. The bracket 20 has an adhesive portion 22 adhered to the inner surface 3a of the front window glass 3. The bracket 20 supports the camera 10 in an orientation in which the vehicle front is imaged through the front window 3 from within the vehicle, with the adhered portion 22 fixed to the inner surface 3a of the front window 3. In one example, the bracket 20 is an injection molded product made of synthetic resin, and is adhered to the inner surface 3a of the front glass 3 by an adhesive or the like. The bracket 20 is provided along the tilt direction of the front window 3, and the camera 10 is mounted on the bracket 20 from the vehicle cabin side. The surroundings of the bracket 20 and the camera 10 may be covered with a camera cover from the vehicle cabin side.

The bracket 20 is a member for supporting the camera 10, and can function as a lens cover for preventing glare and ghost. Therefore, the bracket 20 in the present embodiment may further include a lens cover 21 that encloses a shooting space K1 (field of view) extending in the shooting direction (i.e., forward of the vehicle) with respect to the lens portion 12 of the camera 10. The lens cover 21 and the adhering portion 22 may be integrally formed. A lens opening 28 for exposing the lens 12 of the camera 10 from the vehicle cabin side to the inside of the lens cover 21 is formed in the substantially central portion of the bracket 20. The optical axis CL1 of the lens unit 12 passes through the imaging space K1 from the center of the lens unit 12, and reaches the front window 3 that closes the opening 21b of the lens cover 21.

The lens cover 21 is formed so as to expand the left-right dimension from the lens opening 28 toward the front side. The lens cover 21 is composed of a bottom wall portion 26 facing the imaging space K1 from the lower side and a side wall portion 27 forming a side surface 27a facing the imaging space K1 from the left and right sides. The bottom wall portion 26 extends to the windshield 3 at a position lower than the optical axis CL1 of the lens portion 12 on the vehicle front side with respect to the lens portion 12 of the camera 10. The bottom wall portion 26 is formed in a plane parallel to the vehicle width direction (the vehicle left-right direction) and inclined forward and downward (inclined in a direction away from the optical axis CL1 as approaching the vehicle front) with respect to the vehicle front-rear direction and the optical axis CL1 in a side view. The bottom wall portion 26 has a bottom front surface 26a which is a first surface on the window member side (front window glass 3 side), and a bottom rear surface 26b which is a second surface on the opposite side to the bottom front surface 26 a.

A reflected wave reducing structure 25 for reducing stray light and reflected light (reflected wave) entering the lens unit 12 may be disposed on at least a part (in the present embodiment, the bottom front surface 26 a) of the lens cover 21 (the bottom front surface 26a and the left and right side surfaces 27 a) facing the imaging space K1. The reflected wave reducing structure 25 may be referred to as a glare shield (Stray Light Shield; SLS). The reflected wave reducing structure 25 may be, for example, a structure in which a plurality of wave shapes extending in the vehicle width direction in a triangular cross section are arranged in the front-rear direction. The bottom front surface 26a is widened in the vehicle width direction, and the reflected wave reducing structure 25 is widened in the vehicle width direction in cooperation therewith. The bottom front surface 26a is a gradually expanding pattern that expands the left-right dimension as it moves away from the lens portion 12 according to the angle of view of the lens portion 12. That is, the bottom front surface 26a expands in the vehicle width direction as it moves away from the lens portion 12 in the imaging direction F1. The bottom front surface 26a may be planar or smoothly curved. However, the bottom front surface 26a may have projections and depressions for fixation and reinforcement.

When the lens cover 21 is provided with the reflected wave reducing structure 25 having a three-dimensional shape such as a wave shape, the bottom front surface 26a becomes a reference surface (virtual surface) when the three-dimensional shape is formed. The reflected wave reducing structure 25 has a pattern shape such as a wave shape in which a plurality of reflected waves are arranged along the reference plane. The pattern shape may be a shape having a pattern of a certain period, or may be a shape having a pattern of non-uniformity or random. In addition, instead of being formed in a three-dimensional shape, a structure in which reflected waves are reduced by applying surface treatment such as texturing, coating, or the like may be employed. Further, the reflected wave reducing structure 25 may be provided on the side surface 27a of the lens cover 21.

The bottom front surface 26a and the bottom wall 26 are formed in a triangular shape having a laterally-extending dimension as viewed from a direction perpendicular to the bottom front surface 26 a. The "top view" of the present embodiment refers to a view from a direction perpendicular to the bottom front surface 26a unless otherwise noted, and the "top view" of the present embodiment refers to a view from a direction perpendicular to the bottom front surface 26a unless otherwise noted.

The side surface 27a and the side wall 27 are formed to be curved upward and rearward from the left and right inclined edge portions on both sides of the rear portion of the bottom wall 26. The side surface 27a is formed from the left and right side edges of the lens opening 28 toward the left and right end portions of the front edge of the bottom wall 26, so that the upward and rearward standing height is gradually reduced. The side surface 27a has a smaller vertical dimension than the bottom front surface 26a, and thus the lens cover 21 and the imaging space K1 are formed in a flat shape with the vertical dimension suppressed.

An opening 21b provided along the shooting direction of the camera 10 is formed in the upper surface portion of the lens cover 21. The opening 21b is surrounded by the upper edge of the lens opening 28, the upper edges of the left and right side walls 27, and the front edge of the bottom wall 26. In a state where the lens cover 21 and thus the bracket 20 are fixed to the front window 3, the opening 21b is closed by the inner surface 3a of the front window 3.

In fig. 4 and 5, a line CL2 represents a center line of the bracket 20 in the vehicle width direction. The bracket 20 is configured to be substantially laterally symmetrical with respect to the center line CL 2. In one example, the bracket 20 is arranged such that the center line CL2 coincides with the optical axis CL1 of the camera 10 in a plan view as shown in fig. 4. The camera 10 may be arranged such that the optical axis CL1 coincides with a center line of the vehicle 1 in the vehicle width direction in a plan view. As an example, the bracket 20 may be disposed so that the center line CL2 is offset from the center line of the vehicle 1 in the vehicle width direction in plan view, and the camera 10 may be disposed so that the optical axis CL1 is offset from the center line of the vehicle 1 in the vehicle width direction in plan view.

In the present embodiment, for example, in order to improve the ease of contact during maintenance, the bottom wall portion 26 is divided into a fixed body 30 and a divided body 40 configured to be separable from the fixed body 30. Here, the fixed body 30 is a portion fixed to the vehicle body (the front window 3) so as to include a part (the fixed-side structure portion 25 a) of the reflected wave reducing structure 25, and the divided body 40 is a portion configured to be separable from the fixed body 30 so as to include the remaining other part (the divided-side structure portion 25 b) of the reflected wave reducing structure 25.

The divided body 40 is provided in a substantially rectangular range overlapping the optical axis CL1 in a plan view. The fixed body 30 is provided with a fixed-side opening 37 having a substantially rectangular opening 37b formed by integrating the divided bodies 40. In a state where the division body 40 is attached to the fixed-side opening 37, the fixed body 30 and the division body 40 are arranged coplanar or parallel to each other with the surface constituting the bottom front surface 26 a. In the case where the side surface 27a of the lens cover 21 is provided with the reflected wave reducing structure 25, the divided body 40 including a part of the side wall portion 27 may be provided.

As shown in fig. 5, the camera 10 is mounted on the fixed body 30 side (bottom back surface 26b side) of the bottom wall portion 26. The camera 10 is mounted on the fixed body 30 of the bracket 20 by engaging a not-shown engaged portion provided on the camera body 11 with engaging portions 35, 36, 39 provided on the bottom wall portion 26. As shown in fig. 5, the camera 10 attached to the fixed body 30 and the divided body 40 overlap in a plan view.

Fig. 6 is a plan view of the camera 10 removed from fig. 5, and fig. 7 is a plan view of the divided body 40 removed from fig. 6. As shown in fig. 5 and 6, a heater H for heating the region of the front window glass 3 in the field of view of the camera 10 is disposed on the bottom and rear surface 26b of (the divided body 40 of) the bottom wall portion 26. The heater H is a planar heating element having a heating wire, for example, and is attached to the bottom back surface 26b of the bottom wall 26. By heating the heater H, the imaging space K1 is heated via the cradle 20. By forming an upward air flow in the imaging space K1 in this way, and by causing the air flow to impinge on the front window glass 3, fogging is removed or prevented.

The heater H may be disposed on the bottom front surface 26a side of (the divided body 40 of) the bottom wall portion 26, so as to directly heat the imaging space K1 without using the bracket 20. However, in this case, since the heater H is seen from the outside of the vehicle beyond the windshield 3, the heater H is arranged on the bottom surface 26b side of the bottom wall portion 26 in the present embodiment from the viewpoint of improvement in design.

Fig. 8 shows an enlarged view of the vicinity of the front end portion of the heater H on the vehicle front side in fig. 2. As shown in fig. 7 and 8, the groove 52 is formed in the bottom back surface 26b (second surface) of the bottom wall 26 so that a space is formed between the front end portion of the heater H on the vehicle front side and the bottom wall 26. By exposing the tip portion of the heater H, the air in the groove 52 is directly heated by the heater H.

Further, in the bottom wall portion 26, an opening 51 is formed that communicates a groove 52 formed in the bottom back surface 26b with the bottom front surface 26a (first surface) of the bottom wall portion 26. Thereby, the air in the groove 52 heated by the heater H rises through the opening 51, and impinges on the portion of the windshield 3. Thereby, fogging of this portion of the front window glass 3 is removed or prevented. In the conventional structure without the opening 51, the air heated by the heater H does not reach the portion of the front window 3, and the fog may not be removed. In the present embodiment, by providing such an opening 51, defogging of the windshield 3 can be reliably performed over a wider range.

The opening 51 is formed at a position on the vehicle front side than the front end portion on the vehicle front side of the heater H. This makes it possible to reliably send the air heated by the heater H to a region corresponding to the inclination of the windshield 3 (the inclination decreases as the vehicle moves forward).

As shown in fig. 8, the height P2 from the front end of the heater H in the front end of the upper wall 21c of the groove 52 connected to the opening 51 is higher than the height P1 from the front end of the heater H in the rear end of the upper wall 21 c. That is, the upper wall 21c is inclined in a direction approaching the optical axis CL1 as going toward the front of the vehicle. Accordingly, the air in the groove 52 is heated by the heater H to form an upward air flow, and smoothly flows along the inclined upper wall 21c of the groove 52, and enters the opening 51. In this way, by providing the inclination in the direction approaching the optical axis CL1 with the vehicle forward in the upper wall 21c of the groove 52, the delivery performance of the air heated by the heater H in the groove 52 can be improved.

As shown in fig. 7, the opening 51 may be formed as a long hole-like opening that is long in the vehicle width direction. The groove 52 may be formed in plural in the vehicle width direction. Alternatively, as shown in fig. 10, a plurality of openings 51 may be formed in cooperation with the plurality of grooves 52. With these configurations, the air heated by the heater H can be widely sent over the entire range in the vehicle width direction.

Fig. 9 shows a modification to the structure of fig. 8. In fig. 9, a heat conductive member M is provided which is arranged to be in contact with the heater H in the groove portion 52 and fills the opening 51. The heat conductive member M is a member made of metal having higher thermal conductivity than the bracket (bottom wall portion) made of resin, for example. The bracket 20 and the heat conductive member M may be manufactured by two-color molding. According to this structure, the heat conductive member M in the opening 51 is heated by the heater H, and by thus heating the air on the heat conductive member M, the fogging of the front window glass 3 thereon is effectively removed by the heated air.

In the above-described embodiment, the four-wheel vehicle is shown as an example of a vehicle, but the present invention can be applied to other types of vehicles such as two-wheel vehicles. The vehicle is shown as an example of the transportation facility, but the present invention can be applied to other types of transportation facilities such as ships and aircrafts.

Summary of the embodiments

The above embodiments disclose at least the following holding device and embodiments of the vehicle.

1. The holding device (10A) for holding a vehicle-mounted camera according to the above embodiment comprises:

a bracket (20) fixed to the surface of the vehicle interior side of a window member (3) that forms a front window (2) of the vehicle (1), and that supports the camera in an orientation in which the camera is transmitted through the window member from the vehicle interior to capture an image of the front of the vehicle; and

a heater (H) disposed on the bracket for heating a region of the window member within a field of view of the camera,

the bracket has a bottom wall portion (26) extending to the window member at a position lower than an optical axis (CL 1) of the lens on a vehicle front side with respect to the lens (12) of the camera, the bottom wall portion having a first surface (26 a) on the window member side and a second surface (26 b) on a side opposite to the first surface,

the heater is attached to the second face of the bottom wall portion,

a groove (52) is formed on the second surface of the bottom wall so that a space is formed between a front end portion of the heater on the vehicle front side and the bottom wall,

an opening (51) is formed in the bottom wall portion so as to communicate the groove portion formed in the second surface with the first surface of the bottom wall portion.

According to this embodiment, fogging of the region of the window member in the field of view of the camera can be reliably removed.

2. In the above-described embodiments of the present invention,

the opening is formed on a vehicle front side of the front end portion of the heater.

According to this embodiment, the air heated by the heater can be reliably sent to the area on the vehicle front side of the window member.

3. In the above-described embodiments of the present invention,

the bottom wall portion is inclined in a direction away from the optical axis with a tendency toward the front of the vehicle.

According to this embodiment, the bottom wall portion can function as a lens cover.

4. In the above-described embodiments of the present invention,

the upper wall of the groove portion is inclined in a direction approaching the optical axis with a tendency toward the front of the vehicle.

According to this embodiment, the air in the groove portion can smoothly flow along the inclination of the upper wall of the groove portion and enter the opening.

5. In the above-described embodiments of the present invention,

the holding device further has a member (M) that is configured to be in contact with the heater in the groove portion and to fill the opening, the member having a higher thermal conductivity than the bottom wall portion.

According to this embodiment, the heat conductive member in the opening is heated by the heater, by which the air on the heat conductive member is heated, and by which the fogging of the window member thereon is effectively removed.

6. In the above-described embodiments of the present invention,

the groove portions are formed in plurality in the entire vehicle width direction.

According to this embodiment, the air heated by the heater can be widely sent over the entire range in the vehicle width direction.

7. In the above-described embodiments of the present invention,

the opening is formed in a plurality by being matched with a plurality of the groove parts.

8. In the above-described embodiments of the present invention,

the opening is a long hole-like opening long in the vehicle width direction.

9. The vehicle (1) according to the embodiment includes:

a window member (3) that forms a front window (2);

a camera (10) for shooting outside the vehicle;

a bracket (20) fixed to a vehicle-interior surface of the window member and supporting the camera in an orientation in which the camera is transmitted through the window member from within the vehicle to capture an image of the front of the vehicle; and

the bracket has a bottom wall portion (26) extending to the window member at a position lower than an optical axis of the lens on a vehicle front side with respect to the lens (12) of the camera, the bottom wall portion having a first surface (26 a) on the window member side and a second surface (26 b) on a side opposite to the first surface,

the heater is attached to the second face of the bottom wall portion,

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications and changes can be made within the scope of the present invention.

Claims

1. A holding device for holding a camera for a vehicle, characterized in that,

the holding device has:

a bracket fixed to a vehicle-interior surface of a window member that forms a front window of a vehicle, the bracket supporting the camera in an orientation in which the camera is transmitted through the window member from within the vehicle to capture a front image of the vehicle; and

a heater disposed on the bracket for heating a region of the window member within a field of view of the camera,

the bracket has a bottom wall portion extending to the window member at a position lower than an optical axis of the lens on a vehicle front side with respect to the lens of the camera, the bottom wall portion having a first surface on the window member side and a second surface on a side opposite to the first surface,

the heater is attached to the second face of the bottom wall portion,

a groove portion is formed in the second surface of the bottom wall portion so that a space is formed between a front end portion of the heater on a vehicle front side and the bottom wall portion,

the bottom wall portion is formed with an opening that communicates the groove portion formed in the second surface with the first surface of the bottom wall portion.

2. The holding device according to claim 1, wherein the opening is formed at a position on a vehicle front side than the front end portion of the heater.

3. The holding device according to claim 1, wherein the bottom wall portion is inclined in a direction away from the optical axis with going toward the front of the vehicle.

4. The holding device according to claim 1, wherein an upper wall of the groove portion is inclined in a direction approaching the optical axis with a tendency toward the front of the vehicle.

5. The holding device according to claim 1, further comprising a member that is configured to be in contact with the heater in the groove portion and to fill the opening, the member having a higher thermal conductivity than the bottom wall portion.

6. The holding device according to claim 1, wherein the groove portion is formed in plurality in the entire vehicle width direction.

7. The holding device according to claim 6, wherein the opening is formed in plurality in cooperation with a plurality of the groove portions.

8. The holding device according to claim 1, wherein the opening is a long hole-like opening long in the vehicle width direction.

9. A vehicle is characterized in that,

the vehicle has:

a window member that constitutes a front window;

a camera for shooting outside the vehicle;

a bracket fixed to a vehicle-interior surface of the window member, the bracket supporting the camera in an orientation in which the camera is transmitted through the window member from within the vehicle to capture a front image of the vehicle; and

the heater is attached to the second face of the bottom wall portion,