JP6970496B2 - In-vehicle rear photography device - Google Patents

Description

The present invention relates to an in-vehicle rear photographing device and the like.

Conventionally, as in Patent Document 1, it has been proposed that an image pickup device (camera) for photographing the rear is mounted on a device attached to the roof of a vehicle such as an in-vehicle antenna device.

Japanese Unexamined Patent Publication No. 2014-150494

However, no means has been taken to remove the water droplets such as rainwater adhering to the optical member such as the lens of the image pickup apparatus.

Therefore, an object of the present invention is to provide an in-vehicle rear photographing apparatus capable of removing water droplets adhering to an optical member.

The in-vehicle rear photographing apparatus according to the present invention has an image pickup unit having a camera body whose image pickup surface faces the rear of the vehicle, and a lower end having a top portion at the upper part on the rear side and at least a semi-elliptical shape or a leaf shape on the front side. The outer shape is formed by the slope connecting the peripheral edge of the part and the top, and the back has a lower back opening that allows light to enter the lens of the camera body. It is provided with a base that holds the outer case with the main body sandwiched between them, and the outer case is provided with an air guiding portion that guides air to the back while traveling.

While the vehicle is running, a part of the air flowing near the in-vehicle rear photography device is guided to the back of the outer case by the air guidance unit, and the front of the optical member (lens, etc.) provided on the front of the camera body is displayed. Pass.
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the front surface of the camera body.

Preferably, the outer case is provided with a passage as an air guiding portion that penetrates the upper back opening provided at a position higher than the lower back opening on the back surface of the outer case and the opening in the outer case.

More preferably, an inclined surface is provided between the passage and the upper back opening, or at the end of the passage on the side where the upper back opening is located, so that the front side is higher than the rear side.

While the vehicle is running, air enters the front opening from the front side and is discharged from the upper back opening through an air guide path formed by the upper part of the outer case, the upper back opening, the front opening, the passage, and the like.
A part of the air discharged from the upper rear opening is guided on the back surface of the exterior case and downward by the inclined surface of the exterior case, and passes through the front surface of the optical member provided on the front surface of the camera body.
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the front surface of the camera body.
Further, the air passing through the passage cools the camera body arranged at the lower part of the passage, and it becomes possible to suppress the temperature rise of the camera body.

Further, preferably, a housing having an antenna portion having an antenna element, a first interior case made of synthetic resin covering the antenna element, and a second interior case made of metal, and holding the image pickup element in the camera body. Is made of metal, the camera body is attached to the second interior case via a metal bracket, and the first interior case and the second interior case are on the base and under the passage. Be placed.

The air passing through the passage cools the metal parts such as the housing of the camera body, the second interior case, and the bracket arranged at the lower part of the passage, and it becomes possible to suppress the temperature rise of the camera body.

More preferably, on the rear side of the side surface of the outer case, a plurality of fins that are dimple-processed or protrude in the left-right direction and extend in the front-rear direction are formed as air guiding portions.

More preferably, the dimple-processed recess provided on the rear side of the side surface of the outer case as an air guiding portion has a depth of 0.35 mm.

More preferably, the dent is formed so that the distance between the deepest point in the dimple-processed dent and the vertical surface including the optical axis of the lens of the camera body is shorter in the rear side than in the front side. Will be done.

Also, preferably, the plurality of fins formed on the rear side of the side surface of the outer case as an air guiding portion have a height of 0.75 mm.

Further, preferably, an exterior case cover is provided on the rear side of the side surface of the exterior case in a state where a gap penetrating in the front-rear direction is formed as an air guiding portion.

More preferably, an air guide wall that does not come into contact with the side surface or the back surface of the outer case and projects inward is provided on the rear side of the outer case cover.

While the vehicle is running, air enters from the front side and is discharged through an air guide path formed by the outer case and the outer case cover.
A part of the discharged air is guided on the back surface of the outer case and downward by the air guide wall, and passes through the front surface of the optical member provided on the foremost surface of the camera body.
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the front surface of the camera body.

Further, preferably, on the rear side of the side surface of the outer case, dimple processing is performed as an air guiding portion, or a plurality of fins protruding in the left-right direction and extending in the front-rear direction are formed.

While the vehicle is running, the air flowing near the side surface of the exterior case passes through the dimple-processed area or the fin-formed area provided behind the side surface of the exterior case, so that the air flows near the back surface of the exterior case. A turbulent flow is generated in the outer case, and the air flowing on the side surface of the outer case does not separate from the outer case, and the air easily flows in the vicinity of the back surface of the outer case.
A part of the air flowing on the side surface of the outer case is guided downward and on the back surface of the outer case without being separated from the outer case, and passes through the front surface of the optical member provided on the frontmost surface of the camera body.
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the front surface of the camera body.

As described above, according to the present invention, it is possible to provide an in-vehicle rear photographing apparatus capable of removing water droplets adhering to an optical member.

It is a perspective view showing the state before each part of the vehicle-mounted rear photographing apparatus in the first embodiment is assembled, and is viewed from above and diagonally from the front. It is a perspective view showing a state before the exterior case, the camera cover, the passage, and the exterior pad in the first embodiment are pumped up, and is viewed from above and diagonally from behind. It is a perspective view showing the state before each part around the base in the first embodiment is assembled, and is viewed from above and diagonally from the front. It is a perspective view of the vehicle-mounted rear photographing device according to the first embodiment, and is viewed from above and diagonally from the front. It is a perspective view of the vehicle-mounted rear photographing device according to the first embodiment, and is viewed from above and diagonally from behind. It is a top view of the vehicle-mounted rear photography device in the first embodiment. It is a front view of the vehicle-mounted rear photographing apparatus in 1st Embodiment. It is a rear view of the vehicle-mounted rear photography device in the first embodiment. It is a side view of the vehicle-mounted rear photographing apparatus in 1st Embodiment. FIG. 7 is a sectional view taken along the line AA of FIG. In the cross-sectional view taken along the line BB in FIG. 9, the members inside the outer case excluding the passage are omitted. It is a perspective view showing the state before each part of the vehicle-mounted rear photographing apparatus in the second embodiment is assembled, and is viewed from above and diagonally from the front. It is a perspective view showing a state before the exterior case, the exterior case cover, and the exterior pad in the second embodiment are pumped up, and is viewed from above and diagonally from behind. It is a perspective view of the vehicle-mounted rear photographing device in the second embodiment and is viewed from above and diagonally from the front. It is a perspective view of the vehicle-mounted rear photographing device in the second embodiment and is viewed from above and diagonally from behind. It is a top view of the vehicle-mounted rear photographing device in the second embodiment. It is a front view of the vehicle-mounted rear photographing apparatus in the 2nd Embodiment. It is a rear view of the vehicle-mounted rear photography device in the second embodiment. It is a side view of the vehicle-mounted rear photographing apparatus in the 2nd Embodiment. 17 is a sectional view taken along the line CC of FIG. In the DD cross-sectional configuration diagram of FIG. 19, the members inside the outer case are omitted. It is sectional drawing of EE of FIG. It is a perspective view of the vehicle-mounted rear photographing device according to the third embodiment, and is viewed from above and diagonally from the front. It is a perspective view of the vehicle-mounted rear photographing device according to the third embodiment, and is viewed from above and diagonally from behind. It is a top view of the vehicle-mounted rear photographing device in the third embodiment. It is a front view of the vehicle-mounted rear photography device in the third embodiment. It is a rear view of the vehicle-mounted rear photography device in the third embodiment. It is a side view of the vehicle-mounted rear image pickup apparatus in 3rd Embodiment. FIG. 6 is a sectional view taken along line FF in FIG. 26. FIG. 28 is a sectional view taken along line GG showing the exterior case 11. It is a perspective view of the vehicle-mounted rear photographing device according to the fourth embodiment and is viewed from above and diagonally from the front. It is a perspective view of the vehicle-mounted rear photographing device according to the fourth embodiment and is viewed from above and diagonally from behind. It is a top view of the vehicle-mounted rear photography device in the fourth embodiment. It is a front view of the vehicle-mounted rear photographing apparatus in the 4th Embodiment. It is a rear view of the vehicle-mounted rear photography device in the fourth embodiment. It is a side view of the vehicle-mounted rear photographing apparatus in 4th Embodiment.

Hereinafter, the first embodiment will be described with reference to the drawings. The vehicle-mounted rear photographing device 1 in the first embodiment is attached to the upper surface of a vehicle 90 such as a roof, and includes a case 10, an antenna unit 30, and an imaging unit 50 (see FIGS. 1 to 11).

In order to explain the direction, the front-rear direction of the vehicle 90 to which the in-vehicle rear photographing device 1 is mounted is defined as the x direction, the left-right direction perpendicular to the x direction is defined as the y direction, and the substantially vertical direction perpendicular to the x direction and the y direction is defined as the z direction. explain.
In addition, giving priority to clearly showing the configuration of each part, different hatching patterns may be applied between drawings even for the same member.

The case 10 is a member that covers members constituting the vehicle-mounted rear photographing device 1 such as an antenna element 31 and a camera body 51, and is an exterior case 11, an exterior pad 13, and an interior case 15 (first interior case 15a, second interior case 15b). , Base 17, interior pad 19, seal member 21 (first seal member 21a, second seal member 21b), and pre-lock 23 (first pre-lock 23a, second pre-lock 23b).
The antenna unit 30 has an antenna element 31 and an antenna cable 35.
The image pickup unit 50 includes a camera body 51 including an image pickup element such as CMOS, a camera cable 55, a first packing 56a, a second packing 56b, a bracket 57, and a ground plate 59.

The outer case 11 is made of a synthetic resin having non-translucency and radio wave transmission (a resin molded product formed of a synthetic resin containing polycarbonate (Polycarbonate) and ASA (Acrylate Styrene Acrylonitrile)).

The outer case 11 is a member having an open lower surface and constituting the in-vehicle rear photographing device 1, other than the outer case 11 (exterior pad 13, interior case 15, base 17, interior pad 19, antenna element 31, antenna). A part of the cable 35, a camera body 51, a part of the camera cable 55, etc.) is covered from above in the z direction (see FIGS. 1 and 10).
However, a part of the lens of the camera body 51 may be in a form of protruding rearward in the x direction from the back surface of the exterior case 11.

The outer case 11 has a top 110a at the upper part on the rear side in the x direction, and is a slope connecting the lower end peripheral portion 110b and the top 110a having a ring shape and at least a semi-elliptical shape or a leaf shape on the front side in the x direction. The outer shape is formed.
The first slope 111 connecting the front portion in the x direction and the top 110a of the lower end peripheral edge 110b is gentler than the second slope 112 connecting the rear portion in the x direction and the top 110a of the lower edge peripheral portion 110b. Has a nice slope. The shape of the exterior case 11 described above is, for example, a so-called shark fin shape.

On the back surface (second slope 112) of the outer case 11, an opening (lower back opening 11a1) for incident light from the rear onto the lens of the camera body 51 of the image pickup unit 50 provided for photographing the rear of the vehicle 90. ) Is provided, and the portion of the lower back opening 11a1 other than the lens is covered with the camera cover 11b.

The camera cover 11b covers the periphery of the lens of the camera body 51.
The upper portion of the lens of the camera body 51 in the camera cover 11b has an inclined surface (cover inclined surface 11b1) in which the front side in the x direction is higher than the rear side in the x direction.

An opening (upper back opening 11a2) is provided on the back surface (second slope 112) of the outer case 11 and above the lower back opening 11a1.
An opening (front opening 11c) is provided on the front surface of the outer case 11.
In the first embodiment, the upper part of one opening provided on the back surface of the exterior case 11 constitutes the upper back opening 11a2, and the lower part constitutes the lower back opening 11a1. However, two openings are described. It may be provided in the form provided.

Inside the outer case 11, a passage 11d for connecting the upper back opening 11a2 and the front opening 11c is provided.
The passage 11d has a bottom surface portion 11d1 and a side surface portion 11d2, and has a substantially groove-shaped (or substantially tubular shape) along the upper portion of the inner wall of the outer case 11 (see FIG. 2).
The front side of the bottom surface portion 11d1 in the x direction is in contact with the lower end of the front opening 11c, and the rear side of the bottom surface portion 11d1 in the x direction is in contact with the cover inclined surface 11b1 of the camera cover 11b.
The bottom surface portion 11d1 is located above the first interior case 15a and the second interior case 15b, which will be described later, in the z direction.
The side surface portion 11d2 extends upward in the z direction from both ends of the bottom surface portion 11d1 in the y direction.
The front side of the side surface portion 11d2 in the x direction is in contact with the front opening 11c, the rear side of the side surface portion 11d2 in the x direction is in contact with the upper back opening 11a2, and the upper end portion of the side surface portion 11d2 is in contact with the upper part of the inner wall of the exterior case 11.

When the passage 11d has a substantially groove shape, the inner wall on the back surface (second slope 112) of the exterior case 11 above the upper back opening 11a2 has an inner wall in which the front side in the x direction is higher than the rear side in the x direction. It has an inclined surface 11a3 (see FIG. 10).
When the passage 11d has a substantially tubular shape, the upper surface of the end portion of the passage 11d on the upper back opening 11a2 side has an inclined surface (not shown) in which the front side in the x direction is higher than the rear side in the x direction.

Between the passage 11d and the upper back opening 11a2 (or the end of the passage 11d on the side where the upper back opening 11a2 is located), an inclined surface (inner wall inclined surface 11a3, cover) in which the front side in the x direction is higher than the rear side in the x direction. An inclined surface 11b1) is provided.

The upper part of the outer case 11, the upper back opening 11a2, the cover inclined surface 11b1, the front opening 11c, and the passage 11d form an air guide path (cavity) penetrating the inside of the outer case 11 in the x direction. It functions as an air guiding unit that guides the air that has entered through the front opening 11c to the back surface during traveling.

The upper part of the interior case 15, the base 17, the interior pad 19, the antenna element 31, a part of the antenna cable 35, the camera body 51, a part of the camera cable 55, etc. is sealed by the inner wall of the exterior case 11 and the passage 11d. Covered in state.

Even in the form in which a window portion (not shown) made of synthetic resin having translucency and radio wave transmission is attached to the region of the camera cover 11b that covers the lens of the camera body 51 for the purpose of waterproofing or the like. However, in the first embodiment, the camera body 51 is attached to the second interior case 15b so as to come into contact with the camera cover 11b attached to the rear opening 11a, via between the camera cover 11b and the camera body 51. Since the infiltrated water is discharged through the drainage notch 13a provided in the exterior pad 13, the window portion may not be provided. Hereinafter, the form in which the window portion is not attached to the region of the camera cover 11b that covers the lens of the camera body 51 will be described.

If the window cannot be attached to the area of the camera cover 11b that covers the lens of the camera body 51, the lens of the camera body 51 provided on the frontmost side (rear side in the x direction) is the camera body described later. It functions as an optical member provided on the frontmost surface (rear side in the x direction) of the 51.
When the window portion is attached to the area of the camera cover 11b that covers the lens of the camera body 51, the window portion functions as an optical member provided on the frontmost surface (rear side in the x direction) of the camera body 51, which will be described later. ..

The outer case 11 is provided with a first locking claw 11e for attaching to the base 17 so as to project downward from the inner wall in the z direction, and when the base 17 is fixed to the outer case 11, the first locking claw 11e is provided. The claw 11e engages with the second locking claw 17a provided on the base 17 (see FIG. 10).

The exterior pad 13 is an annular elastic member made of elastomer, rubber, or the like, and is fitted into the lower end peripheral edge portion 110b of the outer case 11, and is between the lower end peripheral edge portion 110b of the outer case 11 and the vehicle 90. The gap is blindfolded and water is prevented from entering the outer case 11.
A drainage notch 13a is provided at the lower end of the exterior pad 13 at the rear end in the x direction as a drainage port for water that has entered between the exterior case 11 and the interior case 15 (FIGS. 2 and 5). , FIG. 8 and FIG. 10).

The interior case 15 has a first interior case 15a and a second interior case 15b.

The lower surface of the first interior case 15a is open, and the region on the base 17 of the antenna cable 35 (the region between the portion connected to the antenna element 31 and the portion inserted into the first opening 17c1) and the antenna element. 31 is covered from above in the z direction.
The first interior case 15a is made of a synthetic resin having non-translucency and radio wave transmission (a resin molded product formed of a synthetic resin containing polycarbonate (Polycarbonate) and ASA (Acrylate Styrene Acrylonitrile)).

The second interior case 15b is arranged behind the first interior case 15a in the x direction, has an opening on the lower surface and the back surface, and is a region on the base 17 of the camera cable 55 (second from a portion connected to the camera body 51). The area up to the portion inserted into the opening 17c2) is covered from above in the z direction.
The camera body 51 is attached to the open portion on the back surface of the second interior case 15b via the second packing 56b, the bracket 57, and the first packing 56a, and the first packing 56a, the second packing 56b, and the bracket 57 attach the camera body 51. , The space between the second interior case 15b and the camera body 51 is sealed.
In order to shield the noise generated from the camera body 51 and the camera cable 55, it is desirable that the second interior case 15b is made of a metal such as aluminum.
At the lower ends of the first interior case 15a and the second interior case 15b, screw holes 15c used for screwing to the base 17 are provided.

The base 17 is a metal base such as aluminum.
However, except for the conductive region connecting the ground plate mounting portion 17e on the base 17 and the second boss 17d2 extending downward and the connection region in contact with the second interior case 15b on the base 17, Polybutylene Terephthalate (Polybutylene Terephthalate) is provided. ) And the like may be formed of a resin.
The base 17 has a second locking claw 17a on the outer peripheral portion that engages with the first locking claw 11e of the outer case 11 to lock the outer case 11 (see FIG. 10).
The base 17 holds the exterior case 11 with the image pickup unit 50 including the camera body 51 sandwiched between them.

An antenna element 31 including an antenna substrate is attached to a portion of the upper surface of the base 17 covered with the first inner case 15a by screwing.

A recess (screw receiver 17b) used for screwing to the interior case 15 (first interior case 15a, second interior case 15b) is provided on the peripheral portion of the base 17.

The interior pad 19 is attached to the peripheral edge of the upper surface of the base 17 and inside the screw receiver 17b.

The base 17 is provided with a wiring opening 17c.
The wiring opening 17c is different from the two openings (the first opening 17c1 and the first opening 17c1 provided in the area covered by the first interior case 15a in the base 17, and is x than the first opening 17c1. It has a second opening 17c2) that is located rearward in the direction and is provided in the area of the base 17 that is covered by the second interior case 15b.

The antenna cable 35 connected to the antenna element 31 extends downward in the z direction of the base 17 via the first opening 17c1 (see FIGS. 1, 3, and 10).
The camera cable 55 connected to the camera body 51 extends downward in the z direction of the base 17 via the second opening 17c2.

Bosses 17d (first boss 17d1 and second boss 17d2) extending downward in the z direction are provided on the lower surface of the base 17.
Specifically, a first boss 17d1 extending downward in the z direction is provided on the lower surface of the base 17 in the region covered by the first interior case 15a.
A second boss 17d2 extending downward in the z direction is provided on the lower surface of the base 17 in the region covered by the second interior case 15b.
The boss 17d (first boss 17d1, second boss 17d2) may be a form configured separately from the base 17 (see FIG. 10), or a form configured integrally (not shown). May be good.
In the first embodiment, the boss 17d extends downward from the base 17 in the z direction, but the boss 17d may be attached to the base 17 from the lower side in the z direction by screwing or the like.

The in-vehicle rear photographing device 1 is fixed to the upper surface of the vehicle 90 by pre-lock 23 (first pre-lock 23a, second pre-lock 23b), boss 17d (first boss 17d1, second boss 17d2), washer with claw, or nut. It is done using mounting brackets (not shown) such as.

Specifically, the first boss 17d1 is inserted into the first boss hole 23a1 provided in the first pre-lock 23a, and the antenna cable 35 passing through the first opening 17c1 is provided in the first pre-lock 23a. A camera cable 55 inserted into the cable hole 23a2, the second boss 17d2 was inserted into the second boss hole 23b1 provided in the second pre-lock 23b, and the camera cable 55 passed through the second opening 17c2 was provided in the second pre-lock 23b. After being inserted into the second cable hole 23b2 and the pre-lock 23 (first pre-lock 23a, second pre-lock 23b) is attached to the base 17 to which the outer case 11 and the inner case 15 are attached, the first pre-lock 23a is first. The second pre-lock 23b is fitted into the mounting hole 91a from above, the second pre-lock 23b is fitted into the second mounting hole 91b provided behind the first mounting hole 91a from above, the base 17 is mounted on the roof of the vehicle 90, and the vehicle is mounted. The first boss 17d1 and the second boss 17d2 are fixed from the lower surface of the roof of 90 by using mounting brackets (not shown) such as washers with claws and nuts.

Although the washer with a claw and the nut are not shown in the drawings of the first embodiment (FIGS. 1 to 10), in FIG. 29 of the third embodiment, the washer with a claw 24a is used as the first pre-lock 23a and the second pre-lock 23b. It shows a state in which the nut 24b is attached and attached to the first boss 17d1 and the second boss 17d2.

Further, the first pre-lock 23a is fitted into the first mounting hole 91a provided on the roof of the vehicle 90 from above, and the second pre-lock 23b is fitted into the second mounting hole 91b on the roof of the vehicle 90 from above. The first boss 17d1 is inserted into the first boss hole 23a1 and the antenna cable 35 passing through the first opening 17c1 is inserted into the first cable hole 23a2. The second boss 17d2 is inserted into the second boss hole 23b1, the camera cable 55 passing through the second opening 17c2 is inserted into the second cable hole 23b2, the base 17 is placed on the roof of the vehicle 90, and the vehicle is mounted. The first boss 17d1 and the second boss 17d2 may be fixed from the lower surface of the roof of the 90 using a nut (not shown) or the like.

A seal member 21 (first seal member 21a, second seal member 21b), which is an annular elastic member made of elastomer, rubber, or the like, is provided on the lower surface of the base 17, and the base 17 is provided by the seal member 21. The periphery of the region between the vehicle 90 and the roof of the vehicle 90 where the mounting holes 91 (first mounting holes 91a and second mounting holes 91b) are provided is watertightly sealed.
The first seal member 21a is arranged so that the ring constituting the first seal member 21a passes through the first boss 17d1, the first prelock 23a, and the antenna cable 35.
The second seal member 21b is arranged so that the ring constituting the second seal member 21b passes through the second boss 17d2, the second prelock 23b, and the camera cable 55.
However, instead of the form in which the two seal members 21 (first seal member 21a and second seal member 21b) are provided, the rings constituting one seal member 21 are the first boss 17d1, the first pre-lock 23a, and the antenna cable. It may be in the form of passing the 35, the second boss 17d2, the second pre-lock 23b, and the camera cable 55.

On the upper surface of the base 17, in the vicinity of the area where the camera body 51 is mounted, a ground plate mounting portion 17e for screwing the ground plate 59 for grounding the camera body 51 is provided.

The interior pad 19 is an annular elastic member made of elastomer, rubber, or the like, and is provided on the upper surface of the base 17 (see FIGS. 1, 3, and 10).
The interior pad 19 has an annular region facing the lower end of the first interior case 15a and an annular region facing the lower end of the second interior case 15b.
When the interior case 15 (first interior case 15a, second interior case 15b) is fixed to the base 17 by screwing, the interior pad 19 is pressed by the lower end of the interior case 15 and the upper surface of the base 17, and the interior case 15 is pressed. And the base 17 are sealed.

The pre-lock 23 is a resin member that is fitted into the mounting hole 91 of the vehicle 90, and has two pre-locks 23 (first pre-lock 23a and second pre-lock 23b) in the first embodiment.
The first pre-lock 23a has a first boss hole 23a1 through which the first boss 17d1 passes, and a first cable hole 23a2 facing the first opening 17c1 through which the antenna cable 35 passes, and a portion protruding downward in the z direction is first. It is fitted into the mounting hole 91a.
The second pre-lock 23b has a second boss hole 23b1 through which the second boss 17d2 passes, and a second cable hole 23b2 facing the second opening 17c2 through which the camera cable 55 passes, and a portion protruding downward in the z direction is the second. It is fitted into the mounting hole 91b.

The boss 17d (first boss 17d1 and second boss 17d2) may be inserted into another mounting hole (not shown) provided in the vehicle 90 without passing through the pre-lock 23.
Further, the pre-lock 23 may be attached to the base 17 from the lower side in the z direction as in the first embodiment, or may be attached to the base 17 from the upper side in the z direction.

The antenna element 31 may be in the form of a flat antenna for GPS reception or the like, or may be in the form of an upper element and a lower element for receiving AM / FM broadcasts, and may be a base. It is attached to 17 or the first interior case 15a. However, when the first inner case 15a is not provided, a part of the antenna element 31 may be attached to the outer case 11 or the passage 11d.
The antenna cable 35 is used to supply electric power to the antenna amplifier included in the antenna element 31 and to output a signal obtained by the antenna element 31.

The image pickup unit 50 is arranged so that the image pickup surface of the image pickup element in the camera body 51 faces the rear of the vehicle 90.
The housing of the camera body 51 that holds the circuit board and the image sensor is made of a metal (for example, aluminum) that also serves as a shield conductor.

The camera cable 55 used for supplying power and control signals to the camera body 51 and outputting the image signal obtained by the camera body is a first packing 56a and a bracket 57 from the back surface of the camera body 51. , The second packing 56b, the second interior case 15b, and the second opening 17c2, and extend downward in the z direction of the base 17.

The camera cable 55 extending from the camera body 51 extends linearly in the substantially x direction perpendicular to the image pickup surface of the image pickup element and linearly toward the back side (the front side in the substantially x direction), and extends downward in the z direction near the upper side of the second opening 17c2. It is bent and extends downward in the z direction.

The bracket 57 is made of metal and has a substantially tubular shape with front and rear surfaces open, and is used for adjusting the mounting angle between the second interior case 15b and the camera body 51.
Specifically, the angle formed by the surface of the bracket 57 facing the camera body 51 and the base 17 is the first angle θ1 (see FIG. 10), and the angle formed by the bracket 57 is different from the first angle θ1 (see FIG. 10). (Not shown) is prepared, and the bracket 57 to be used is selected according to the inclination of the area to which the vehicle-mounted rear photographing device 1 is attached on the roof of the vehicle 90.
Further, a plurality of camera covers 11b having different shapes are prepared according to the bracket 57 to be used, and the camera cover 11b corresponding to the selected bracket 57 is used.

The housing of the camera body 51 is connected to the ground plate mounting portion 17e via a ground plate 59 made of metal for the purpose of grounding (see FIGS. 1 and 3).

The roof of the vehicle 90 is provided with mounting holes 91 (first mounting holes 91a, second mounting holes 91b) for the vehicle-mounted rear photographing device 1.
The first mounting hole 91a includes a region facing the first opening 17c1, and the second mounting hole 91b includes a region facing the second opening 17c2.
The first pre-lock 23a is fitted into the first mounting hole 91a, and the second pre-lock 23b is fitted into the second mounting hole 91b.
In the first embodiment, two mounting holes (a first mounting hole 91a for passing the first boss 17d1 and the antenna cable 35, and a second mounting hole 91b for passing the second boss 17d2 and the camera cable 55) are provided. A form (see FIG. 1) will be described, but a form in which a mounting hole for passing one boss is separately provided may be provided (not shown).
Further, the antenna cable 35 and the camera cable 55 may pass through one mounting hole.

When the air guiding portion is not provided in the outer case 11, the air flowing near the side surface of the outer case 11 is separated from the outer case 11 near the boundary between the side surface and the back surface while the vehicle 90 is running, and is near the back surface. Air does not flow easily.

In the first embodiment, while the vehicle 90 is traveling, air enters the front opening 11c from the front side in the x direction, and the upper part of the exterior case 11, the upper back opening 11a2, the cover inclined surface 11b1, the front opening 11c, and the passage 11d. It is discharged from the upper back opening 11a2 through the air guide path formed by.
A part of the air discharged from the upper back opening 11a2 is on the back surface (second slope 112) of the exterior case 11 and downward in the z direction by the cover inclined surface 11a3 of the inner wall inclined surface 11a3 of the outer case 11 and the camera cover 11b. It is guided and passes through the front surface of an optical member (lens or the like) provided on the frontmost surface (rear side in the x direction) of the camera body 51.
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the foremost surface of the camera body 51.

Further, the air passing through the passage 11d cools metal parts such as the housing of the camera body 51 arranged below the passage 11d, the second interior case 15b, and the bracket 57, and suppresses the temperature rise of the camera body 51. Will be possible.

In the first embodiment, a passage 11d penetrating in the front-rear direction (x direction) is provided above the first interior case 15a, the second interior case 15b, and the camera body 51 in the exterior case 11, and the upper portion of the exterior case 11 is provided. The air passing through the air guide path formed by the upper back opening 11a2, the cover inclined surface 11b1, the front opening 11c, and the passage 11d is applied to the optical member provided on the frontmost surface (rear side in the x direction) of the camera body 51. The form of removing or making it difficult for the attached water droplets to adhere has been described, but the means for removing the attached water droplets or making it difficult to adhere (the air guiding unit that guides the air to the back surface while traveling) is , May be another form.

For example, the exterior case cover 12 has a gap formed in the rear side of the side surface of the exterior case 11 as an air guiding portion for guiding air flowing near the side surface of the exterior case 11 to the back surface while traveling. Is provided, and an air guide path is formed between the outer case cover 12 and the outer case 11 (see the second embodiment, FIGS. 12 to 22).

The outer case cover 12 covers the side surface of the outer case 11 and the rear side in the x direction, and is separated from the outer case 11 except that it is connected to the outer case 11 at several places such as an upper end portion and a lower end portion.
Between the exterior case cover 12 and the exterior case 11, the front side in the x direction and the rear side in the x direction are opened, and an air guide path (cavity) penetrating the front and back in the x direction is formed (front opening 12a1, rear opening 12a2). ..
At the end of the exterior case cover 12 on the rear side in the x direction, an air guide wall 12b is provided so as not to come into contact with the side surface or the back surface of the exterior case 11 and to be substantially perpendicular to the exterior case cover 12 and project inward. ..
The outer case cover 12 may be formed separately from the outer case 11 or may be integrally formed.
In the second embodiment, the outer case 11 and the outer case cover 12 are separately formed, and the protruding portion 12c extending downward in the z direction of the outer case cover 12 is provided in the mounting hole 110c provided on the side surface of the outer case 11. The form in which the outer case cover 12 is attached to the outer case 11 by being fitted is shown (see FIGS. 13 and 21).

While the vehicle is traveling, air enters the front opening 12a1 from the front side in the x direction, passes through an air guide path formed by the exterior case 11 and the exterior case cover 12, and is discharged from the rear opening 12a2.
A part of the air discharged from the rear opening 12a2 is guided on the back surface (second slope 112) of the exterior case 11 and downward in the z direction by the air guiding wall 12b, and is guided downward in the z direction to the front surface (x direction rear) of the camera body 51. It passes through the front surface of an optical member (lens, etc.) provided on the side).
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the foremost surface of the camera body 51.

Further, as an air guiding portion that guides air flowing near the side surface of the exterior case 11 to the back side behind the side surface of the exterior case 11, a vortex generating portion (first vortex generating portion 11f (third embodiment, the third embodiment, (See FIGS. 23 to 30), and a form in which the second vortex generating portion 11 g (see the fourth embodiment, FIGS. 31 to 36) is provided is conceivable.
In the third embodiment, as the first vortex generating portion 11f, dimple processing is performed on the rear side of the side surface of the exterior case 11 (a plurality of substantially spherical cap-shaped dents are provided).

The substantially spherical cap-shaped recess has a radius of curvature r of 5 mm and a depth d of 0.35 mm, which is the deepest one arranged on the rear side.

The distance between the deepest point (bottom) of the substantially spherical cap-shaped recess and the vertical surface including the optical axis LX of the lens of the camera body 51 is shorter on the rear side than on the front side. A substantially spherical cap-shaped recess is arranged (a1 <a2 <a3 <a4 <a5, see FIG. 30).
That is, due to the shape of the side surface of the exterior case 11, the substantially spherical cap-shaped dents are those on the rear side of the front side, except for the substantially spherical crown-shaped dents arranged in the rear 1 to 2 rows. It gets deeper.

While the vehicle is running, the air flowing near the side surface of the exterior case 11 passes through the recess of the first vortex generating portion 11f provided on the rear side of the side surface of the exterior case 11, so that the back surface (second slope) of the exterior case 11 is passed. 112) A turbulent flow is generated in the vicinity of the outer case 11, and the air flowing on the side surface of the outer case 11 does not separate from the outer case 11 and easily flows in the vicinity of the back surface of the outer case 11.
A part of the air flowing on the side surface of the outer case 11 is guided on the back surface of the outer case 11 and downward in the z direction by the first vortex generating portion 11f without being separated from the outer case 11, and is the frontmost surface of the camera body 51. It passes through the front surface of an optical member (lens, etc.) provided (on the rear side in the x direction).
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the foremost surface of the camera body 51.

In the fourth embodiment, as the second vortex generating portion 11g, a plurality of fins having a substantially V-shaped cross section protruding in the y direction and extending in the x direction are provided on the rear side of the side surface of the exterior case 11.
The fins having a substantially V-shaped cross section are arranged in the vertical direction along the side surface of the outer case 11, and a groove having a substantially V-shaped cross section extending in the x direction is formed between the adjacent fins.
The portion of the fin having a substantially V-shaped cross section near the back surface (second slope 112) of the exterior case 11 has a height h of about 0.75 mm, and the fin is gradually lowered toward the front side in the x direction. It is desirable to be formed.

While the vehicle is running, the air flowing near the side surface of the exterior case 11 passes through the fins of the second vortex generating portion 11g provided on the rear side of the side surface of the exterior case 11, so that the back surface (second slope) of the exterior case 11 is passed. 112) A turbulent flow is generated in the vicinity of the outer case 11, and the air flowing on the side surface of the outer case 11 does not separate from the outer case 11 and easily flows in the vicinity of the back surface of the outer case 11.
A part of the air flowing on the side surface of the outer case 11 is guided on the back surface of the outer case 11 and downward in the z direction by the second vortex generating portion 11g without being separated from the outer case 11, and is the frontmost surface of the camera body 51. It passes through the front surface of an optical member (lens, etc.) provided (on the rear side in the x direction).
When water droplets or dust are attached to the optical member, the water droplets or the like are moved or blown around the lens by air, and the water droplets or the like are removed from the optical member.
Further, the air passing through the front surface of the optical member functions as an air curtain, and water droplets such as rainwater are less likely to adhere to the front surface of the optical member.
This makes it possible to prevent water droplets and the like from adhering to the optical member provided on the foremost surface of the camera body 51.

The air guiding portion that guides the air to the back surface of the exterior case 11 during traveling may be in the form of combining a plurality of air guiding portions.
For example, the air that guides the air that has entered from the front opening 11c to the back while traveling through the air guidance path formed by the upper part of the exterior case 11, the upper back opening 11a2, the cover inclined surface 11b1, the front opening 11c, and the passage 11d. It is used as a guiding part, and further, a vortex generating part (first vortex generating part 11f or a second vortex generating part 11g) is provided behind the side surface of the outer case 11 to allow air flowing near the side surface of the outer case 11 during traveling. A form used as an air guiding portion for guiding to the back surface is conceivable.

Further, since the air guide portion (member) in the first to fourth embodiments is an air guide path that does not use a member that requires electric power such as a motor or is surface-treated, the antenna portion 30 It is possible to remove water droplets adhering to the optical member in a state where it is unlikely to adversely affect the reception performance of the optical member.

1 In-vehicle rear photography device 10 Case 11 Exterior case 11a1 Lower back opening 11a2 Upper back opening 11a3 Inner wall inclined surface 11b Camera cover 11b1 Cover inclined surface 11c Front opening 11d Passage 11d1 Bottom part 11d2 Side part 11e First locking claw 11f First vortex Generating part 11g Second vortex generating part 12 Exterior case cover 12a1 Front opening 12a2 Rear opening 12b Air guide wall 12c Protruding part 13 Exterior pad 13a Drainage notch 15 Interior case 15a First interior case 15b Second interior case 15c Screw hole 17 Base 17a 2nd locking claw 17b Screw receiver 17c Wiring opening 17c1 1st opening 17c2 2nd opening 17d Boss 17d1 1st boss 17d2 2nd boss 17e Earth plate mounting part 19 Interior pad 21 Sealing member 21a 1st sealing member 21b 1st 2 Seal member 23 Pre-lock 23a 1st pre-lock 23a1 1st boss hole 23a2 1st cable hole 23b 2nd pre-lock 23b1 2nd boss hole 23b2 2nd cable hole 23c 3rd cable hole 24a Claw washer 24b Nut 30 Antenna part 31 Antenna element 35 Antenna cable 50 Imaging unit 51 Camera body 55 Camera cable 56a First packing 56b Second packing 57 Bracket 59 Earth plate 90 Vehicle 91 Mounting hole 91a First mounting hole 91b Second mounting hole 110a Top 110b Bottom edge 110c Mounting hole 111 First slope 112 Second slope a1, a2, a3, a4, a5 Distance between the bottom of the substantially spherical crown-shaped recess forming the dimples and the vertical surface including the optical axis of the lens of the camera body d The abbreviation for forming the dimples Depth of crown-shaped dent h Fin height LX Optical axis of camera body lens r Approximately spherical crown-shaped dent forming dimple Radius of curvature θ1 First angle

Claims (12)

The camera body with the image pickup surface facing the rear of the vehicle,
The antenna part having an antenna element and
A case having a lower rear opening on the back that allows light to enter the lens of the camera body,
A base mounted on the upper surface of the vehicle and holding the case ,
It is provided with an air guiding portion that guides air to the lower rear opening during traveling.
The case has a front opening on the front side of the vehicle and above the antenna element and an upper back opening provided above the lower back opening.
The in-vehicle rear photographing device is characterized in that the air guiding portion is a passage formed from the front opening to the upper back opening between the upper part of the inner wall of the case and the camera body. The vehicle-mounted rear photographing device according to claim 1, wherein the air guiding portion is a groove-shaped or tubular-shaped passage. With an interior case covered by the case,
The camera body has a housing for holding an image sensor, and has a housing.
The vehicle-mounted rear photographing device according to claim 1, wherein the housing is attached to the interior case near the lower rear opening and is made of metal. Even without least provided with a decorated cases covering the antenna element,
The vehicle-mounted rear photographing device according to claim 1, wherein the interior case is covered with the inner wall of the case and the passage in a sealed state. The claim is characterized in that the upper inner wall of the upper back opening in the case or the end of the passage on the side where the upper back opening is located is provided with an inclined surface whose front side is higher than that of the rear side. The in-vehicle rear photography device according to any one of 1 to 4. Comprising a front Symbol first interior case made of synthetic resin covering the antenna element and a metal of the second interior casing,
The camera body is attached to the second interior case via a metal bracket.
The vehicle-mounted rear photographing device according to claim 1 , wherein the first interior case and the second interior case are located on the base and below the passage. The camera body with the image pickup surface facing the rear of the vehicle,
A case that covers the camera body and has an opening on the back that allows light to enter the lens of the camera body.
It is provided with an air guiding unit that guides air to the opening during traveling.
The air guiding portion is a plurality of dimples provided on the rear side of the side surface of the case, or a plurality of fins formed on the rear side of the side surface of the case so as to be elongated in the front-rear direction and project in the left-right direction. An in-vehicle rear photography device characterized by this. Before Kide Inpu Le-vehicle rear photographing device according to claim 7, characterized in that it has a depth of 0.35 mm. Said Dinpu point deepest of definitive Le, the distance between the vertical plane including the optical axis of the lens of the camera body, than the front, so that towards the things behind is shortened, the dimples are formed The vehicle-mounted rear photographing apparatus according to claim 8. Before fin number of Kifuku-vehicle rear photographing device according to claim 7, characterized in that it has a height of 0.75 mm. The camera body with the image pickup surface facing the rear of the vehicle,
A case covering the camera body, and a case having an open mouth through which light enters the lens of the camera body to the back,
A base mounted on the upper surface of the vehicle and holding the case ,
It is provided with an air guiding unit that guides air to the opening during traveling.
The air guiding portion is a plurality of dimples provided on the rear side of the side surface of the case, or a plurality of fins formed on the rear side of the side surface of the case so as to be elongated in the front-rear direction and project in the left-right direction. An in-vehicle rear photography device characterized by this. The camera body with the image pickup surface facing the rear of the vehicle,
A case that covers the camera body and has a lower rear opening on the back that allows light to enter the lens of the camera body.
A base mounted on the upper surface of the vehicle and holding the case ,
An air guide unit that guides air to the back surface while driving,
The antenna part having an antenna element and
The first interior case made of synthetic resin that covers the antenna element, and
With a second metal case,
The case has a front opening provided on the front side and an upper back opening provided above the lower back opening.
The air guiding portion is a passage formed from the front opening to the upper back opening between the upper part of the inner wall of the case and the camera body.
Housing for holding the imaging device before Symbol camera body is made of a metal,
The camera body is attached to the second interior case via a metal bracket.
An in-vehicle rear photographing device, wherein the first interior case and the second interior case are placed on the base and below the passage.

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