Priority is claimed on Japanese Patent Application No. 2018-159707, filed on Aug. 28, 2018, the contents of which are incorporated herein by reference.
The present invention relates to an arrangement structure of a vehicle imaging unit that includes an imaging device which images the surroundings of a vehicle.
A technique is known in which an imaging unit (a camera) having an imaging device that images a side rear direction of a vehicle and a monitor that displays an image captured by the imaging device are integrated, and the integrated monitor unit is attached to a triangular window portion at a front part of a front side door (refer to Published Japanese Translation No. 2013-520363 of the PCT International Publication).
In the monitor unit described in Published Japanese Translation No. 2013-520363 of the PCT International Publication, in a state where the monitor unit is attached to the triangular window portion of the front side door, the monitor is arranged in a vehicle room, and the imaging unit is arranged outside the vehicle room. An imaging lens of the imaging unit is arranged on a rear surface of a housing such that an optical axis of the imaging lens is directed to the side rear direction of the vehicle.
However, a height position of the imaging unit arranged outside the vehicle is not sufficiently considered with respect to the monitor unit described in Published Japanese Translation No. 2013-520363 of the PCT International Publication.
In a case where the surroundings of a vehicle is imaged using an imaging unit, when traveling at night, there may be cases in which recognition of the silhouette of a following vehicle is prevented by halation due to the light of the headlight of the following vehicle. Currently, it is desired to resolve this problem by appropriate arrangement of the imaging unit.
An aspect of the present invention provides a vehicle imaging unit arrangement structure capable of preventing occurrence of halation at a display part due to light of a headlight of another vehicle.
A vehicle imaging unit arrangement structure according to an aspect of the present invention is an arrangement structure of a vehicle imaging unit that is arranged on an outside part of a vehicle and that includes an imaging device which captures an image of a surrounding of the vehicle and which outputs the captured image to a display device, wherein the vehicle imaging unit is arranged in a height range from a height of 925 mm from a ground surface to a maximum vehicle height.
According to researches by the inventors of the present invention, the height position at which a headlight of a vehicle used on a public road is arranged is about 950 mm from the ground at the highest, and in consideration of the optical axis of the headlight being directed slightly downward, it is found that, when an imaging device is at a height of 925 mm or more from the ground, halation due to the light of a headlight of a following vehicle does not easily occur.
In the present arrangement structure, since the vehicle imaging unit is arranged in a height range from a height of 925 mm from the ground surface to a maximum vehicle height, it is possible to prevent occurrence of halation at the display part due to the light of a headlight of another vehicle. Accordingly, when the present arrangement structure is employed, it becomes possible to clearly recognize the silhouette of a following vehicle using the display device when traveling at night.
The vehicle imaging unit may be arranged at a lower position than a door waist part of a side door.
In this case, it becomes difficult for the vehicle imaging unit to enter the driver's view through a window frame part above the door waist part. Therefore, when this structure is employed, it is possible to further widely ensure the driver's direct view.
The vehicle imaging unit may be arranged at a higher position than a character line that is provided to protrude on an outer surface of a vehicle body side part and that extends substantially in a vehicle front-to-rear direction.
In this case, since the vehicle imaging unit is arranged at a position above the protruding character line of the vehicle body side part, the splash that is splashed by a front wheel of the vehicle when the vehicle is traveling is blocked by a raised part of the character line and hardly adheres to the vehicle imaging unit. Therefore, it is possible to make the image captured by the imaging device of the vehicle imaging unit further clear.
The vehicle imaging unit may be arranged at a side door that includes a retractable flash door handle on an outer surface of the side door, and the vehicle imaging unit and the flash door handle may be formed in the substantially same size and arranged at point-symmetrical positions with respect to a centering point on the character line in a vehicle side view.
In this case, since the vehicle imaging unit and the flash door handle are arranged in a point-symmetric manner so as to interpose the character line in a side view of the side door, the appearance design property of the side door is enhanced.
The vehicle imaging unit may be arranged at a height position at which a ratio of an amount of reflection of the vehicle to an entire display screen of the display device is equal to or less than a predetermined value.
In this case, it is possible to sufficiently ensure an amount of reflection of surroundings of the vehicle in the display screen of the display device.
According to an aspect of the present invention, the vehicle imaging unit is arranged in a height range from a height of 925 mm from the ground surface to a maximum vehicle height, and therefore, it is possible to prevent occurrence of halation at the display part due to the light of a headlight of another vehicle.
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, frontward and rearward, upward and downward, and right and left mean frontward and rearward, upward and downward, and right and left with respect to a vehicle unless otherwise indicated. An arrow UP that indicates an upward direction of the vehicle, an arrow FR that indicates a frontward direction of the vehicle, and an arrow LH that indicates a left side direction of the vehicle are shown at appropriate positions in the drawings.
In
The rear display system 10 includes a rearward direction imaging device 15 that is arranged on an outer side of each of right and left front side doors 5, a pair of monitors 11 each of which is provided in the vehicle room and corresponds to each of the right and left rear imaging devices 15, and a control device (not shown) that controls the rearward direction imaging device 15 and the monitor 11. The monitor 11 corresponding to each of the right and left rear imaging devices 15 is arranged in the vicinity of a lower end of right and left front pillars 7 in the vehicle interior. An image of the left rear direction of the vehicle is displayed on the monitor 11 at the lower end of the left front pillar 7. An image of the right rear direction of the vehicle is displayed on the monitor 11 at the lower end of the right front pillar 7.
As shown in
An image of the side rear direction that is captured by the rearward direction imaging device 15 is displayed on the display screen 13 of the monitor 11 together with part of a vehicle body B at the side part of the vehicle. The display screen 13 is set such that when the vehicle 1 travels on a flat road surface, a horizontal line h in the vehicle rear direction and a road surface r in the vehicle rear direction by a predetermined distance are simultaneously displayed on the display screen 13. An imaging target to be reflected on the display screen 13 is appropriately set in accordance with a size of the display screen 13, an arrangement height and a position in the front-to-rear direction of the rearward direction imaging device 15, a field angle, or the like. An amount of reflection of the vehicle on the display screen 13 is set to, for example, 10% or less of the entire display screen 13.
As shown in
The housing 19 includes an inner housing 19i that is attached to the outer surface (the side part of the vehicle body) of the front side door 5, an outer housing 190 that is assembled on an outer side of the inner housing 19i in the vehicle width direction, and a bottom housing 19b that is assembled on an opening 20 at bottom portions of the inner housing 19i and the outer housing 19o. The inner housing 19i, the outer housing 19o, and the bottom housing 19b are detachably assembled together by screw fastening, clip fastening, male and female fitting, or the like. The inner housing 19i, the outer housing 19o, and the bottom housing 19b are formed of, for example, a hard plastic material.
As shown in
As shown in
The segmentation boundary portion 23 between the inner housing 19i and the outer housing 190 extends toward a lower surface side across the front and rear end portions of the inner housing 19i and the outer housing 19o. As shown in
The rearward direction imaging device 15 includes a device main body 15A in which an image sensor and a variety of processing circuits are built and an imaging lens 15B that captures an image of an imaging target. The rearward direction imaging device 15 is arranged at an outer portion in the vehicle width direction of a rear part in the housing 19. The imaging lens 15B is exposed to the outside of the vehicle body at an outer portion in the vehicle width direction of the rear end region 22 of the housing 19. A rearward inclined surface 22A that is directed to the side rearward direction of the vehicle is provided on an outer portion in the vehicle width direction of the rear end region 22 of the housing 19 (outer housing 19o). A first lens exposure hole 25 (a lens arrangement part) for exposing the imaging lens 15B to the outside is provided on the rearward inclined surface 22A. As shown in
The downward direction imaging device 17 is used for a blind monitor system or the like that displays the side lower direction of the vehicle, which becomes a blind spot from the driver seat, on a monitor (not shown) on the driver seat side. The downward direction imaging device 17 includes a device main body 17A in which an image sensor and a variety of processing circuits are built and an imaging lens 17B that captures an image of an imaging target. The imaging lens 17B is exposed to the outside of the vehicle body at a lower surface in a middle region of the housing 19 in the vehicle front-to-rear direction. A second lens exposure hole 26 for exposing the imaging lens 17B to the outside is provided on a lower surface of the bottom housing 19b. As shown in
As shown in
A side surface of the housing 19 on the outer side in the vehicle width direction is formed of an arc surface that is curved in the vertical direction. On the side surface on the outer side in the vehicle width direction, a groove 32 (a notched part) having a substantially rectangular cross-section is formed substantially in the vehicle body front-to-rear direction at a position slightly lower than a maximum protruding part 31 that protrudes outward in the vehicle width direction. The light irradiation part 30b of the light guide body 30 of the lamp unit 18 is arranged on the groove 32 of the housing 19. A rear end portion of the light irradiation part 30b of the light guide body 30 is arranged in front of a position facing the rearward inclined surface 22A in the groove 32 of the housing 19. That is, the light irradiation part 30b is not arranged in the vicinity of the rear end portion of the groove 32 of the housing 19. Thereby, it is possible to prevent the light that is emitted from the light irradiation part 30b from being incident on the imaging lens 15B of the rearward direction imaging device 15 in advance.
The rear end portion of the groove 32 of the housing 19 may be closed by a member having no light transparency.
On the other hand, the inclined part 30a of the light guide body 30 of the lamp unit 18, the base block 27, the circuit board 28, the lamb body 29 and the like are arranged inside the housing 19. The inclined part 30a of the light guide body 30 is arranged substantially along the inclined region 21 of the outer surface of the housing 19. In the housing 19, the downward direction imaging device 17 is arranged at an inner part in the vehicle width direction of the inclined part 30a of the light guide body 30. The imaging lens 17B of the downward direction imaging device 17 is inclined obliquely downward from the device main body 17A toward the outer side in the vehicle width direction. Part of the imaging lens 17B that is inclined obliquely downward is arranged at an inner part in the vehicle width direction of the inclined part 30a of the light guide body 30. As shown in
A protrusion part 33 that protrudes downward is provided in an outer region in the vehicle width direction of the bottom housing 19b. The protrusion part 33 is formed in a spindle shape elongated in the vehicle front-to-rear direction. The second lens exposure hole 26 for exposing the imaging lens 17B of the downward direction imaging device 17 to the lower direction of the bottom housing 19b is formed on the protrusion part 33. In the protrusion part 33, the second lens exposure hole 26 is arranged in a region wider than a width in the vehicle width direction of the second lens exposure hole 26, for example, in a region twice or more wider than the width in the vehicle width direction of the second lens exposure hole 26. The protrusion part 33 has a region that extends toward a further rearward direction of the vehicle than the second lens exposure hole 26 (imaging lens 17B).
The imaging lens 17B of the downward direction imaging device 17 is arranged such that an outer surface of the imaging lens 17B is continuous with a surface shape of the protrusion part 33 of the bottom housing 19b. The rear end portion of the protrusion part 33 that converges in a spindle shape is arranged at a position that overlaps part of the imaging lens 15B of the rearward direction imaging device 15 in the vehicle width direction.
As shown in
Specifically, as shown in
As shown in
The protrusion 40 can also be formed in an annular shape when seen from the direction of the optical axis oa1.
The protrusion 40 (stepped part 39) is formed to be recessed frontward from an outer circumferential end part 37a (an end part in an imaging target direction) of the lens hood 37.
The imaging unit 12 of the present embodiment is arranged at a height equal to or less than that of the side part of the vehicle 1.
Hereinafter, this will be described with reference to
The imaging unit 12 is arranged in a height range from a height of 925 mm from a ground surface to a maximum vehicle height h2.
In the case of the present embodiment, the imaging unit 12 is arranged at a higher position than a height h1 of the character line 35 of the front side door 5 and a lower position than the door waist part 36 of the front side door 5.
In the case of the present embodiment, a retractable flash door handle 45 is provided on a rear edge part of the outer surface of the front side door 5. The flash door handle 45 is formed in a horizontally elongated rectangular shape in a side view of the vehicle. The imaging unit 12 that is attached to a front edge part of the outer surface of the front side door 5 is formed in a horizontally elongated rectangular shape having the same size and substantially the same shape as those of the flash door handle 45 in a side view of the vehicle. The imaging unit 12 and the flash door handle 45 are arranged at point-symmetrical positions with respect to a centering point on the character line 35 in a side view of the vehicle.
As described above, in the arrangement structure of the imaging unit 12 of the present embodiment, since an arrangement height of the imaging unit 12 is in a height range from a height of 925 mm from the ground surface to the maximum vehicle height h2, halation due to the light of headlight of the following vehicle is less likely to occur. That is, in the present embodiment, since the imaging unit 12 is arranged at a height of 950 mm as a maximum arrangement height of a headlight of a general vehicle used on a public road, that is, at a height equal to or more than 925 mm in consideration of a downward inclination of the optical axis of the headlight, it is possible to prevent occurrence of halation in the image of the monitor 11 when the light of headlight of the following vehicle directly enters the rear imaging device 15. Accordingly, when the arrangement structure of the imaging unit 12 of the present embodiment is employed, it is possible to clearly recognize the silhouette of the following vehicle using the monitor 11 when traveling at night.
Further, in the arrangement structure of the imaging unit 12 of the present embodiment, the imaging unit 12 is arranged at a lower position than the door waist part 36 of the front side door 5. Therefore, it becomes difficult for the imaging unit 12 to enter the driver's view through the window frame part of the front side door 5. Accordingly, when the arrangement structure of the imaging unit 12 of the present embodiment is employed, it is possible to further widely ensure the driver's direct view.
Further, in the arrangement structure of the imaging unit 12 of the present embodiment, the vehicle imaging unit 12 is arranged at a higher position than the height h1 of the character line 35 on the side part of the vehicle body. Therefore, as shown in
Further, in the arrangement structure of the imaging unit 12 of the present embodiment, the retractable flash door handle 45 is provided on the outer surface of the front side door 5, and the vehicle imaging unit 12 and the flash door handle 45 are formed in the substantially same size and arranged at point-symmetrical positions with respect to a centering point on the character line 35 in a vehicle side view. Therefore, when the front side door 5 is seen from a side direction of the vehicle, the imaging unit 12 and the flash door handle 45 are arranged in a balanced manner so as to interpose the character line 35. Accordingly, when the arrangement structure of the present embodiment is employed, it is possible to enhance the appearance design property of the front side door 5.
Further, in the arrangement structure of the imaging unit 12 of the present embodiment, the imaging unit 12 is arranged at a height position at which an amount of reflection of the vehicle with respect to the entire display screen 13 of the monitor 11 is equal to or less than a predetermined value (for example, 10% or less). Therefore, when the arrangement structure of the present embodiment is employed, it is possible to sufficiently ensure an amount of reflection of surroundings of the vehicle in the display screen 13 of the monitor 11.
The present invention is not limited to the embodiment described above, and a variety of design changes can be made without departing from the scope of the present invention.
Number | Date | Country | Kind |
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2018-159707 | Aug 2018 | JP | national |