CN212737941U - Vehicle lamp and vehicle - Google Patents

Vehicle lamp and vehicle Download PDF

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Publication number
CN212737941U
CN212737941U CN202021461660.7U CN202021461660U CN212737941U CN 212737941 U CN212737941 U CN 212737941U CN 202021461660 U CN202021461660 U CN 202021461660U CN 212737941 U CN212737941 U CN 212737941U
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CN
China
Prior art keywords
radar
vehicle
radio wave
lamp
shielding portion
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Active
Application number
CN202021461660.7U
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Chinese (zh)
Inventor
绵野裕一
桂田善弘
久保山治
丸山雄太
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Provided are a vehicle lamp and a vehicle, which can secure the reliability of radar data obtained by a radar and shield the radar from the outside of the vehicle. A vehicle lamp includes: a lamp housing; a lamp cover that covers an opening of the lamp housing; a lighting unit disposed in a lamp chamber formed by the lamp housing and the lamp cover; a radar (5) configured to acquire radar data indicating the surrounding environment of a vehicle by emitting a radio wave to the outside of the vehicle; a shielding unit (6) that is disposed so as to face the radar (5) so as to shield the radar (5) from the outside of the vehicle, and that is configured to pass radio waves emitted from the radar (5); and a radio wave absorption cover (7) which is provided so as to surround the antenna section (53) of the radar (5) and is configured to absorb radio waves emitted from the radar (5).

Description

Vehicle lamp and vehicle
Technical Field
The present disclosure relates to a vehicle lamp and a vehicle. In particular, the present disclosure relates to a vehicle lamp and a vehicle having a radar such as a millimeter wave radar and a microwave radar mounted thereon.
Background
The following techniques are known: a radar such as a millimeter wave radar configured to acquire data indicating the surrounding environment outside the vehicle is mounted on the vehicle lamp (see, for example, patent document 1). According to patent document 1, in order to shield a millimeter wave radar disposed in a lamp chamber of a vehicle lamp from the outside of a vehicle, a light guide plate made of resin is disposed in front of the millimeter wave radar. Further, by allowing light from the light source to enter the light guide plate, light emission of the light guide plate can be visually confirmed from the outside. In this way, the millimeter wave radar can be shielded from the outside of the vehicle by the light emission of the light guide plate, and the radio wave from the millimeter wave radar can be emitted to the outside of the vehicle through the light guide plate.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2008-186741
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
However, in the vehicle lamp disclosed in patent document 1, it is necessary to additionally prepare a light guide plate for shielding the millimeter wave radar, and therefore the number of parts of the vehicle lamp increases, and the number of steps of the assembly work of the vehicle lamp increases. In this regard, there is room for improvement in a vehicle lamp including a radar such as a millimeter wave radar and a shielding portion that shields the radar.
The purpose of the present disclosure is to provide a vehicle lamp and a vehicle that can shield a radar from the outside of the vehicle while ensuring reliability of radar data obtained by the radar.
Means for solving the problems
A vehicle lamp according to an aspect of the present disclosure includes:
a lamp housing;
a lamp cover that covers an opening of the lamp housing;
a lighting unit disposed in a lamp chamber formed by the lamp housing and the lamp cover;
a radar configured to acquire radar data indicating a surrounding environment of a vehicle by emitting a radio wave to an outside of the vehicle;
a shielding portion that is disposed so as to face the radar so as to shield the radar from outside the vehicle, and that is configured to pass a radio wave emitted from the radar; and
and a radio wave absorption cover provided so as to surround an antenna portion of the radar, and configured to absorb radio waves emitted from the radar.
According to the above configuration, the radio wave absorbing cover that absorbs the radio wave emitted from the radar is provided so as to surround the antenna portion of the radar. Therefore, it is possible to avoid a situation in which the radio wave existing in the field of view of the radar is reflected by the shielding portion and other optical components, and as a result, the reflected radio wave is received by the radar and adversely affects the radar data. In this way, it is possible to provide a vehicle lamp that can shield a radar from the outside of a vehicle while ensuring reliability of radar data obtained by the radar mounted on the vehicle lamp.
The radio wave absorbing cover may be disposed outside the field of view of the radar.
According to the above configuration, since the radio wave absorption cover is disposed outside the field of view of the radar, it is possible to avoid a situation in which the radio wave in the field of view directly emitted from the radar is absorbed by the radio wave absorption cover.
The radio wave absorbing cover may be disposed between the shielding portion and the radar so as to be shielded from the outside of the vehicle by the shielding portion.
According to the above configuration, the radio wave absorption cover and the radar can be shielded from the outside of the vehicle by the shielding portion. Thus, the impairment of the design of the appearance of the vehicle lamp can be prevented.
Further, the radar may further include a support member fixed to the lamp housing and supporting the radar. The radio wave absorbing cover may be fixed to the support member.
According to the above configuration, since the radio wave absorption cover is fixed to the support member that supports the radar, the positioning accuracy of the radio wave absorption cover with respect to the radar (particularly, the antenna portion of the radar) can be improved.
The shielding portion may be formed integrally with the lamp cover.
According to the above configuration, since the shielding portion is integrally formed with the cover, a working process for attaching the shielding portion to the vehicle lamp can be omitted. In this way, the number of steps for assembling the vehicle lamp having the shielding portion can be reduced.
The thickness t of the shielding portion may be defined by the following equation.
t＝λ/2εr 1/2×n
Where λ is the wavelength of the radio wave emitted from the radar, εrIs the relative dielectric constant of the shielding part, and n is an integer of 1 or more.
According to the above configuration, the thickness t of the shielding portion is t ═ λ/2 ∈r 1/2Since xn is defined, the radio wave reflected by one surface of the shielding portion facing the radar and the radio wave reflected by the other surface of the shielding portion weaken each other. As a result, the reflectivity of the shielding portion with respect to the radio wave emitted from the radar can be reduced. In this way, since the intensity of the reflected radio wave reflected by the shielding portion becomes weak, it is possible to avoid a situation in which the reflected radio wave enters the receiving antenna of the radar and adversely affects the radar data.
The distance between the shielding portion and the radar may be 20mm to 100 mm.
According to the above configuration, when the distance between the shielding portion and the radar is 20mm or more, the reflected radio wave emitted from the radar and reflected by the shielding portion is sufficiently attenuated before reaching the receiving antenna of the radar. Therefore, it is possible to avoid a situation in which the reflected radio wave incident on the receiving antenna adversely affects radar data as a noise component. On the other hand, when the distance between the shielding portion and the radar is 100mm or less, it is possible to avoid a situation in which a part of the radio wave existing in the field of view of the radar cannot pass through the shielding portion.
Further, a vehicle provided with the vehicle lamp can be provided.
According to the above, it is possible to provide a vehicle that can shield a radar from the outside of the vehicle while ensuring reliability of radar data obtained by the radar.
Effect of the utility model
According to the present disclosure, it is possible to provide a vehicle lamp and a vehicle that can shield a radar from the outside of the vehicle while ensuring reliability of radar data obtained by the radar.
Drawings
Fig. 1 is a front view of a vehicle including a left side vehicle lamp and a right side vehicle lamp.
Fig. 2 is a vertical sectional view of the right side vehicle lamp.
Fig. 3 is a diagram showing a reflected radio wave reflected by the shielding portion.
Fig. 4 is a front view showing only the radio wave absorption cover and the radar.
Fig. 5 is a horizontal cross-sectional view showing the radar, the support member, the shielding portion, and the radio wave absorbing cover.
Description of the reference numerals
1: vehicle with a steering wheel
2: vehicle lamp
2L: left side vehicle lamp
2R: right side lamp for vehicle
3: lighting unit for low beam
4: lighting unit for high beam
5: radar apparatus
6: shielding part
7: electric wave absorbing cover
8: support member
12: lamp shade
14: lamp shell
18a, 18 b: protrusion part
20a, 20 b: spacer
22: screw with a thread
23: spear-shaped object
24: screw with a thread
30: air layer
51: front panel
52: rear face
53: antenna unit
54: side surface
72: radio wave absorbing sheet
73: cover main body
Detailed Description
Hereinafter, embodiments of the present disclosure (hereinafter, simply referred to as "the present embodiment") will be described with reference to the drawings. The dimensions of the respective members shown in the drawings may be different from the actual dimensions of the respective members for convenience of explanation.
In the description of the present embodiment, for convenience of description, the terms "left-right direction", "up-down direction", and "front-back direction" may be appropriately used. These directions are relative directions set with respect to the vehicle 1 shown in fig. 1. Here, the "left-right direction" is a direction including the "left direction" and the "right direction". The "up-down direction" is a direction including the "up direction" and the "down direction". The "front-rear direction" is a direction including the "front direction" and the "rear direction". In fig. 1, the "front-rear direction" is not shown, but the "front-rear direction" is a direction perpendicular to the left-right direction and the up-down direction.
In the present embodiment, the "horizontal direction" of the vehicle 1 is mentioned, but the "horizontal direction" is a direction perpendicular to the vertical direction (vertical direction) and includes the left-right direction and the front-rear direction. In the present embodiment, the directions (the left-right direction, the up-down direction, and the front-back direction) set for the right side vehicle lamp 2R and the left side vehicle lamp 2L are the same as the directions (the left-right direction, the up-down direction, and the front-back direction) set for the vehicle 1.
First, a vehicle 1 according to the present embodiment will be described with reference to fig. 1. Fig. 1 is a front view of a vehicle 1 including a left side vehicle lamp 2L and a right side vehicle lamp 2R. As shown in fig. 1, a left side vehicle lamp 2L is disposed on the left front side of the vehicle 1, and a right side vehicle lamp 2R is disposed on the right front side of the vehicle 1. Each of the left side vehicle lamp 2L and the right side vehicle lamp 2R includes a low beam illumination unit 3, a high beam illumination unit 4, a radar 5, and a shielding portion 6 that shields the radar 5.
In the present embodiment, the left side vehicle lamp 2L and the right side vehicle lamp 2R have the same configuration. Therefore, in the following description, a specific configuration of the right vehicle lamp 2R will be described with reference to fig. 2. For convenience of description, the left vehicle lamp 2L and the right vehicle lamp 2R may be simply and generically referred to as "vehicle lamps 2".
The low beam illumination unit 3 is configured to emit a low beam light distribution pattern toward the front of the vehicle 1. The high beam illumination unit 4 is configured to emit a high beam light distribution pattern toward the front of the vehicle 1.
The radar 5 is configured to emit radio waves (for example, millimeter waves or microwaves) to the outside of the vehicle 1, thereby acquiring radar data indicating the surrounding environment of the vehicle 1. The radar 5 is, for example, a millimeter wave radar or a microwave radar. A vehicle control unit (vehicle-mounted computer), not shown, is configured to identify the surrounding environment of the vehicle 1 (in particular, information on an object existing outside the vehicle 1) based on the radar data output from the radar 5.
The radar 5 includes an antenna unit 53 (see fig. 2) and a communication circuit unit (not shown). The antenna unit 53 includes: one or more transmitting antennas configured to radiate radio waves (for example, millimeter waves having a wavelength of 1mm to 10 mm) into the air, and one or more receiving antennas configured to receive reflected radio waves reflected by an object. The antenna portion may be configured as a patch antenna (metal pattern formed on the substrate). The radio wave radiated from the transmitting antenna is reflected by an object such as another vehicle, and then the reflected radio wave from the object is received by the receiving antenna.
The communication circuit unit includes a transmission-side RF (radio frequency) circuit, a reception-side RF circuit, and a signal processing circuit. The communication circuit unit is configured as a Monolithic Microwave Integrated Circuit (MMIC). The transmission-side RF circuit is electrically connected to the transmission antenna. The reception-side RF circuit is electrically connected to the reception antenna. The signal processing circuit is configured to generate radar data by processing the digital signal output from the reception-side RF circuit.
The antenna unit 53 and the communication circuit unit may be housed in the case. The antenna portion 53 may be covered with an antenna cover.
The shielding portion 6 is disposed so as to face the radar 5 so as to shield the radar 5 from the outside of the vehicle 1. The shielding portion 6 is configured to transmit the radio wave emitted from the radar 5. The shielding portion 6 may be formed of an opaque resin member, for example. In particular, the shielding portion 6 may be formed of an opaque resin member colored in a predetermined color such as black. The shielding portion 6 may be formed of a retro-reflector having a plurality of fine prisms. In this case, since light from the outside is totally reflected by the prism of the retro-reflector, the radar 5 can be shielded from the outside by the retro-reflector. In this way, the radar 5 can be shielded from the outside of the vehicle 1 by the shielding portion 6, and the design of the appearance of the right-side vehicle lamp 2R can be improved.
Fig. 2 is a vertical direction (vertical direction) cross-sectional view of the right side vehicle lamp 2R. As shown in fig. 2, the right vehicle lamp 2R further includes a lamp housing 14, a cover 12 covering an opening of the lamp housing 14, a support member 8, and a radio wave absorbing cover 7. The lamp housing 14 may also be formed of a metal member, for example. The globe 12 may be formed of a transparent resin member, for example. The low beam illumination unit 3 and the high beam illumination unit 4 are disposed in a lamp chamber S formed by a lamp housing 14 and a globe 12.
In the present embodiment, an ADB illumination unit that emits a light distribution pattern for ADB (adaptive Driving beam) having an illumination region and a non-illumination region may be disposed in the lamp room S instead of the high beam illumination unit 4. In addition, the LiDAR unit and the camera may be disposed in the lamp room S.
The support member 8 is a metal bracket and is configured to support and fix the radar 5. The support member 8 is fixed to the lamp housing 14 via screws 22 (see fig. 5). The support member 8 extends downward from the lamp housing 14. Further, since the radar 5 and the support member 8 are disposed outside the lamp housing S, it is possible to appropriately prevent the operation of the radar 5 from being adversely affected by heat generated from the low beam illumination unit 3 and the high beam illumination unit 4.
The shielding portion 6 is formed integrally with the shade 12, and extends downward from the shade 12. In this regard, the shielding portion 6 and the globe 12 may be integrally formed by two-color molding using a mold. In the case where the shielding portion 6 and the globe 12 are integrally formed by two-color molding, a protruding portion is formed at the shielding portion 6 and the globe 12 at or near the boundary portion between the shielding portion 6 and the globe 12. Therefore, in the present embodiment, the relative positional relationship between the shielding portion 6 and the radar 5 is adjusted so that the boundary portion between the shielding portion 6 and the globe 12 is arranged outside the field of view Fv in the vertical direction of the radar 5.
Since the boundary portion between the shielding portion 6 and the globe 12 is arranged outside the field of view Fv of the radar 5 in this manner, the radio wave existing in the field of view Fv of the radar 5 is reflected by the protruding portion formed in the vicinity of the boundary portion, and as a result, it is possible to avoid a situation in which the reflected radio wave enters the receiving antenna of the radar 5 and adversely affects radar data. Therefore, the radar 5 can be shielded from the outside of the vehicle 1 while ensuring the reliability of the radar data obtained by the radar 5 mounted on the right-side vehicle lamp 2R.
The field of view Fn (see fig. 5) of the radar 5 in the horizontal direction may be, for example, in the range of 120 ° to 180 °. In other words, the field of view Fn of the radar 5 may be within a range of ± 60 ° to ± 90 ° with respect to the central axis of the radar 5. The vertical field of view Fv of the radar 5 may be, for example, in the range of 3 ° to 100 °. The field of view of the radar 5 is synonymous with the detection range of the radar 5.
The distance d between the shielding portion 6 and the radar 5 in the front-rear direction may be set to be 20mm to 100mm in association with the relative positional relationship between the radar 5 and the shielding portion 6. When the distance d between the shielding portion 6 and the radar 5 is 20mm or more, the reflected radio wave emitted from the radar 5 and reflected by the shielding portion 6 is sufficiently attenuated before reaching the receiving antenna of the radar 5. Therefore, it is possible to avoid a situation in which the reflected radio waves received by the radar 5 adversely affect the radar data as a noise component.
On the other hand, when the distance between the shielding part 6 and the radar 5 is 100mm or less, it is possible to avoid a situation in which a part of the radio wave existing in the field of view of the radar 5 cannot pass through the shielding part 6. That is, it is possible to avoid a situation in which a part of the radio wave that cannot pass through the shielding portion 6 is reflected by the boundary portion between the shielding portion 6 and the globe 12 and other optical members, and as a result, the reflected radio wave adversely affects radar data as a noise component.
Next, the thickness t of the shielding portion 6 in the front-rear direction will be described below with reference to fig. 3. Fig. 3 is a diagram showing the reflected radio waves R1, R2 reflected by the shielding part 6. The thickness t of the shielding portion 6 shown in fig. 3 is defined by the following equation (1).
[ formula 1 ]
Figure BDA0002595878150000071
Here, λ is the wavelength of the radio wave emitted from the radar 5. EpsilonrIs the relative dielectric constant of the shielding part 6, and n is an integer of 1 or more.
In this way, when the thickness t of the shielding part 6 is set to the thickness defined by the above equation (1), the reflected electric wave R2 reflected by the one surface 62 of the shielding part 6 facing the radar 5 and the reflected electric wave R1 reflected by the other surface 63 of the shielding part 6 located on the opposite side of the one surface 62 are attenuated by each other. Specifically, the phase difference Δ θ between the reflected radio wave R2 and the reflected radio wave R1 is (2m +1) pi (m is an integer equal to or greater than zero), and therefore the reflected radio wave R1 and the reflected radio wave R2 weaken each other. As a result, the reflectance of the shielding portion 6 with respect to the radio wave emitted from the radar 5 can be reduced. Therefore, the intensity of the reflected radio wave reflected by the shielding portion 6 becomes weak, and therefore it is possible to avoid a situation in which the reflected radio wave is received by the radar 5 and adversely affects radar data as a noise component. For example in the form of radar 5The wavelength lambda of the radio wave is 3.922mm, and the relative dielectric constant epsilon of the shielding part 6rWhen n is 2 and 1, the thickness t of the shielding portion 6 is 1.386 mm.
Next, the respective structures of the radar 5, the support member 8, and the radio wave absorption cover 7 will be specifically described with reference to fig. 4 and 5. Fig. 4 is a front view showing only the radio wave absorption cover 7 and the radar 5. Fig. 5 is a horizontal sectional view showing the radar 5, the support member 8, the shielding portion 6, and the radio wave absorption cover 7.
As shown in fig. 5, the support member 8 is fixed to the lamp housing 14 via screws 22 as fixing means. The radar 5 is supported and fixed by a lance 23 (an example of an elastic engagement member) provided on the support member 8. The radar 5 has a front face 51, a rear face 52 on the opposite side of the front face 51, and a side face 54 between the front face 51 and the rear face 52. The radio wave emitted from the antenna portion 53 of the radar 5 is radiated into the air through the front surface 51.
Spacers 20a and 20b are provided between the radar 5 and the support member 8. The thermal conductivity of the spacers 20a and 20b may be lower than that of the support member 8. The spacer 20a faces the spacer 20b in the left-right direction. Each of the spacers 20a, 20b abuts against the rear face 52 and the side face 54 of the radar 5. Since the two spacers 20a and 20b separated from each other are provided between the radar 5 and the support member 8 in this manner, the air layer 30 (an example of a heat insulating layer) is formed between the rear surface 52 of the radar 5 and the support member 8. In this way, since the thermal conductivity is lower than that of the air layer 30 of the support member 8, the heat radiated from the engine (not shown) disposed behind the support member 8 is less likely to be transmitted to the rear surface 52 of the radar 5 via the support member 8. Therefore, it is possible to appropriately prevent the radiation heat from the engine from degrading the operation performance of the radar 5 (particularly, the communication circuit unit). Therefore, the reliability of the radar 5 with respect to the radiation heat from the outside can be ensured by the air layer 30.
The radio wave absorption cover 7 is configured to absorb the radio wave emitted from the antenna portion 53 of the radar 5. The radio wave absorption cover 7 includes a cover main body 73 formed as a frustum and a radio wave absorption sheet 72 provided on an inner surface of the cover main body 73. The cover main body 73 may be formed of a resin material, for example. The radio wave absorbing sheet 72 may be formed of an inorganic binder and radio wave absorbing particles provided in the inorganic binder. As an example of the radio wave absorbing particles, epsilon type iron oxide particles and titanium oxide particles may be used. In the case where the radio wave absorption cover 7 is configured only by the cover main body, the cover main body may be formed of a resin material into which radio wave absorption particles are mixed.
The radio wave absorption cover 7 is disposed outside the field of view F of the radar 5 so as to surround the field of view F of the radar 5 (the horizontal field of view Fh and the vertical field of view Fv). At this point, the radio wave absorption cover 7 is provided so as to surround the antenna portion 53 of the radar 5, and is fixed to the support member 8 via the screws 24 (fixing means). In particular, the end portions of the cover main body 73 of the radio wave absorption cover 7 are fixed to the projections 18a and 18b provided on the support member 8 via screws 24. The radio wave absorbing cover 7 is disposed between the shielding portion 6 and the radar 5 in the front-rear direction so as to be shielded from the outside of the vehicle 1 by the shielding portion 6. In this way, the radio wave absorbing cover 7 and the radar 5 can be shielded from the outside of the vehicle 1 by the shielding portion 6, and therefore, the design of the appearance of the right side vehicle lamp 2R can be appropriately prevented from being impaired.
According to the present embodiment, the radio wave absorption cover 7 for absorbing the radio wave emitted from the radar 5 is provided so as to surround the antenna portion 53 of the radar 5. Therefore, it is possible to appropriately prevent the radio wave existing in the field of view F of the radar 5 from being reflected by the shielding portion 6 and other optical members, and as a result, the reflected radio wave enters the antenna portion (particularly, the receiving antenna) of the radar 5 to adversely affect the radar data. In this way, the right side vehicle lamp 2R can be provided that can shield the radar 5 from the outside of the vehicle 1 while ensuring the reliability of radar data obtained by the radar 5 mounted on the right side vehicle lamp 2R. In particular, the radar 5 can reliably receive the reflected radio wave reflected by the object existing outside the vehicle 1, and on the other hand, the presence of the radio wave absorbing cover 7 can reliably avoid receiving the reflected radio wave reflected by the inner surface of the optical component disposed inside the right-side vehicle lamp 2R.
Further, since the radio wave absorption cover 7 is disposed outside the field of view F of the radar 5, it is possible to avoid a situation in which the radio wave in the field of view F directly emitted from the radar 5 is absorbed by the radio wave absorption cover 7. Further, since the radio wave absorption cover 7 is fixed by the support member 8, the positioning accuracy of the radio wave absorption cover 7 with respect to the radar 5 (antenna portion 53) can be improved.
The embodiments of the present invention have been described above, but it is needless to say that the technical scope of the present invention should not be construed as being limited by the description of the embodiments. This embodiment is merely an example, and it is understood by those skilled in the art that various modifications of the embodiment can be made within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the present invention recited in the claims and the equivalent scope thereof.

Claims (8)

1. A vehicle lamp is characterized by comprising:
a lamp housing;
a lamp cover that covers an opening of the lamp housing;
a lighting unit disposed in a lamp chamber formed by the lamp housing and the lamp cover;
a radar configured to acquire radar data indicating a surrounding environment of a vehicle by emitting a radio wave to an outside of the vehicle;
a shielding portion that is disposed so as to face the radar so as to shield the radar from outside the vehicle, and that is configured to pass a radio wave emitted from the radar; and
and a radio wave absorption cover provided so as to surround an antenna portion of the radar, and configured to absorb radio waves emitted from the radar.
2. The vehicular lamp according to claim 1,
the radio wave absorbing cover is disposed outside the field of view of the radar.
3. The vehicular lamp according to claim 1 or 2,
the radio wave absorbing cover is disposed between the shielding portion and the radar so as to be shielded from the outside of the vehicle by the shielding portion.
4. The vehicular lamp according to claim 1 or 2,
further comprises a support member fixed to the lamp housing and supporting the radar,
the radio wave absorbing cover is fixed to the support member.
5. The vehicular lamp according to claim 1 or 2,
the shielding portion is integrally formed with the lamp cover.
6. The vehicular lamp according to claim 1 or 2,
the thickness t of the shielding portion is defined by the following equation,
t＝λ/2εr 1/2×n
where λ is the wavelength of the radio wave emitted from the radar, εrIs the relative dielectric constant of the shielding part, and n is an integer of 1 or more.
7. The vehicular lamp according to claim 1 or 2,
the distance between the shielding part and the radar is 20mm to 100 mm.
8. A vehicle provided with the vehicular lamp according to any one of claims 1 to 7.
CN202021461660.7U 2019-07-26 2020-07-22 Vehicle lamp and vehicle Active CN212737941U (en)

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JP2019-138204 2019-07-26
JP2019138204 2019-07-26

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