CN112303578A - Vehicle lamp and vehicle - Google Patents
Vehicle lamp and vehicle Download PDFInfo
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- CN112303578A CN112303578A CN202010721864.8A CN202010721864A CN112303578A CN 112303578 A CN112303578 A CN 112303578A CN 202010721864 A CN202010721864 A CN 202010721864A CN 112303578 A CN112303578 A CN 112303578A
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- radar
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- lamp
- shielding portion
- shielding
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- 238000005286 illumination Methods 0.000 description 13
- 125000006850 spacer group Chemical group 0.000 description 11
- 230000002411 adverse Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 241000258971 Brachiopoda Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Classifications
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- 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
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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
- 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
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- 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
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- 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)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Provided are a vehicle lamp and a vehicle, wherein the radar can be positioned relative to the vehicle relatively easily and reliably, and the radar can be shielded from the outside of the vehicle. A vehicle lamp includes: a lamp housing (14); a lamp shade; a lighting unit disposed in the lamp chamber; 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 positioning sections (9 a-9 d) that come into contact with the radar (5) and that are configured to determine the position of the radar (5) relative to the shielding section (6). The shielding part (6) is formed integrally with the lamp cover. The positioning portions (9 a-9 d) are formed integrally with the shielding portion (6), and are disposed between the shielding portion (6) and the radar (5).
Description
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
Disclosure of Invention
Problems to be solved by the invention
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.
An object of the present disclosure is to provide a vehicle lamp and a vehicle that can relatively easily and reliably position a radar with respect to the vehicle and shield the radar from the outside of the vehicle.
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
a positioning portion configured to abut against the radar and determine a position of the radar with respect to the shielding portion,
the shielding part is integrally formed with the lamp housing,
the positioning portion is formed integrally with the shielding portion and is disposed between the shielding portion and the radar.
According to the above configuration, the position of the radar with respect to the shielding portion is determined by the positioning portion formed integrally with the shielding portion. In addition, the shielding part is formed integrally with the lamp cover. In this way, at the time when the positioning of the vehicle lamp with respect to the vehicle is completed, the positioning of the radar with respect to the vehicle is also completed at the same time. Therefore, it is possible to provide a vehicle lamp that can relatively easily and reliably position the radar with respect to the vehicle and can shield the radar from the outside of the vehicle.
The radar may have a front surface, a rear surface on the opposite side of the front surface, and a side surface between the front surface and the rear surface. The positioning portion may have a concave portion that abuts against the front surface and the side surface of the radar.
According to the above configuration, the recessed portion of the positioning portion abuts against the front surface and the side surface of the radar, and the position of the radar with respect to the shielding portion can be determined.
The positioning portion may include a first positioning portion and a second positioning portion arranged to face the first positioning portion. The radar may be disposed between the first positioning portion and the second positioning portion.
According to the above configuration, the radar can be reliably positioned with respect to the shielding portion by the first positioning portion and the second positioning portion which face each other.
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;
a support member configured to support and fix the radar; and
a positioning portion configured to abut against the support member and determine a position of the support member with respect to the shielding portion,
the shielding part is integrally formed with the lamp housing,
the positioning portion is formed integrally with the shielding portion and is disposed between the shielding portion and the support member.
According to the above configuration, the position of the support member with respect to the shielding portion is determined by the positioning portion formed integrally with the shielding portion. The shielding portion is formed integrally with the shade, and fixes and supports the radar by a support member. In this way, at the time when the positioning of the vehicle lamp with respect to the vehicle is completed, the positioning of the radar with respect to the vehicle is also completed at the same time. Therefore, it is possible to provide a vehicle lamp that can relatively easily and reliably position the radar with respect to the vehicle and can shield the radar from the outside of the vehicle.
In addition, the radar may be disposed outside the lamp chamber.
According to the above configuration, since the radar is disposed outside the lamp chamber, it is possible to appropriately prevent the operation performance of the radar from being degraded due to radiation heat from the illumination unit disposed inside the lamp chamber.
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 radar and adversely affects 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 in which the radar can be relatively easily and reliably positioned with respect to the vehicle and can be shielded from the outside of the vehicle.
Effects of the invention
According to the present disclosure, it is possible to provide a vehicle lamp and a vehicle that can relatively easily and reliably position a radar with respect to the vehicle and can shield the radar from the outside of the vehicle.
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 horizontal cross-sectional view showing the radar, the support member, and the shielding portion.
Fig. 5 is a front view showing the positioning portion, the radar, and the shielding portion of the present embodiment.
Fig. 6 is a horizontal cross-sectional view showing the radar, the support member, and the shielding portion.
Fig. 7 is a front view showing a positioning portion, a radar, and a shielding portion according to a modification.
Description of the reference numerals
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
8: support member
9a, 9b, 9c, 9 d: positioning part
12: lamp shade
14: lamp shell
18a, 18 b: ribs
19a, 19b, 19c, 19 d: positioning part
20a, 20 b: spacer
30: air layer
53: antenna unit
54: communication circuit unit
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 and a communication circuit unit 54 (see fig. 5). 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 53 may be configured as a patch antenna (metal pattern formed on a 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 54 includes a transmission RF (radio frequency) circuit, a reception 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 54 may be housed in a 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 a 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 globe 12 covering an opening of the lamp housing 14, and a support member 8. 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. 4). 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. Since the shielding portion 6 is integrally formed in the shade 12, the work for attaching the shielding portion 6 to the right side vehicle lamp 2R can be omitted, and the number of steps for assembling the right side vehicle lamp 2R can be reduced.
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 B 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 B between the shielding portion 6 and the globe 12 is disposed outside the field of view Fv in the vertical direction of the radar 5.
Since the boundary portion B between the shielding portion 6 and the globe 12 is disposed 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, 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 reliability of the radar data obtained by the radar 5 mounted on the right-side vehicle lamp 2R can be ensured.
The field of view Fn (see fig. 4) 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 relation to 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 ]
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, the relative dielectric constant ε of the shielding part 6 is set such that the wavelength λ of the radio wave of the radar 5 is 3.922mmrWhen n is 2 and 1, the thickness t of the shielding portion 6 is 1.386 mm.
Next, the structures of the radar 5, the support member 8, and the shielding portion 6 will be described specifically by mainly referring to fig. 4. Fig. 4 is a horizontal cross-sectional view showing the radar 5, the support member 8, and the shielding portion 6. As shown in fig. 4, 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 provided in 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 55 between the front face 51 and the rear face 52. The front 51, rear 52 and side 55 of the radar 5 may correspond to the front, rear and side of the tank of the radar 5, respectively. The radio wave emitted from the antenna portion 53 (transmission antenna) of the radar 5 passes through the front face 51 and is radiated into the air. Further, the reflected radio wave reflected by an object existing outside the vehicle 1 passes through the front surface 51 and enters the antenna portion 53 (receiving antenna).
Spacers 20a and 20b are provided between the rear surface 52 of 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 abuts against the rear face 52 of the radar 5, and extends in the up-down direction along the side face 55 of the radar 5. Similarly, the spacer 20b abuts against the rear face 52 of the radar 5, and extends in the up-down direction along the side face 55 of the radar 5. The spacer 20a faces the spacer 20b in the left-right direction via the air layer 30.
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) can be provided between the rear surface 52 of the radar 5 and the support member 8 relatively easily.
According to the present embodiment, since the air layer 30 functioning as a heat insulating layer is provided between the support member 8 and the rear surface 52 of the radar 5, heat radiated from an engine (external heat source) present behind the radar 5 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 54). Thus, the radar 5 can be shielded from the outside of the vehicle 1 while ensuring the reliability of the radar 5 against the radiated heat from the outside.
In this regard, in the case where the spacers 20a and 20b are not provided between the radar 5 and the support member 8, the rear surface 52 of the radar 5 directly contacts the support member 8. Therefore, the radiation heat from the engine is easily transmitted from the support member 8 having high thermal conductivity to the rear surface 52 of the radar 5. Therefore, there is a concern that the operation performance of the radar 5 is greatly reduced by the radiation heat from the engine.
When the thermal conductivity of the spacers 20a and 20b is lower than that of the support member 8, the radiation heat from the engine is less likely to be transmitted to the radar 5 through the support member 8. Therefore, the spacers 20a and 20b may be formed of a member having a lower thermal conductivity than the support member 8 formed of a metal member.
Next, the positioning portions 9a to 9d will be described below with reference to fig. 4 and 5. Fig. 5 is a front view showing the positioning portions 9a to 9d, the radar 5, and the shielding portion 6. As shown in fig. 4 and 5, each of the positioning portions 9a to 9d is configured to determine the position of the radar 5 with respect to the shielding portion 6 by coming into contact with the radar 5. In other words, the relative positional relationship between the radar 5 and the shielding portion 6 is determined by the positioning portions 9a to 9 d.
Each of the positioning portions 9a to 9d has a concave portion that abuts against the front surface 51 and the side surface 55 of the radar 5. At this point, as shown in fig. 4, the positioning portion 9a has a recess 92a that abuts against the front surface 51 and the side surface 55. The positioning portion 9b has a recess 92b that abuts the front surface 51 and the side surface 55. The recessed portions of the positioning portions are in contact with the front surface 51 and the side surface 55 of the radar 5, so that the position of the radar 5 with respect to the shielding portion 6 can be reliably determined.
In particular, the support member 8 that supports the radar 5 via the screw 22 is fixed to the lamp housing 14 in a state where the positioning portions 9a to 9d are in contact with the radar 5. In this way, the position of the radar 5 with respect to the shielding part 6 can be reliably determined by using the positioning parts 9a to 9 d.
Each of the positioning portions 9a to 9d is formed integrally with the shielding portion 6 and is disposed between the shielding portion 6 and the radar 5 in the front-rear direction. The positioning portions 9a to 9d may be formed of the same material (e.g., an opaque resin material) as the shielding portion 6. For example, the shielding portion 6 and the positioning portions 9a to 9d may be integrally formed by injection molding using a mold.
As shown in fig. 5, the positioning portion 9a (an example of a first positioning portion) faces the positioning portion 9b (an example of a second positioning portion) in the left-right direction. The radar 5 is arranged between the positioning portions 9a and 9b in the left-right direction. The positioning portion 9c faces the positioning portion 9a in the vertical direction. The positioning portion 9d faces the positioning portion 9b in the vertical direction, and faces the positioning portion 9c in the left-right direction.
In the present embodiment, the position of the radar 5 with respect to the shielding portion 6 is determined by the four positioning portions 9a to 9d, but the number of positioning portions is not limited to four. For example, the number of the positioning portions may be two. In this case, it is preferable that one of the two positioning portions faces the other positioning portion via the radar 5 in the left-right direction. Furthermore, the two positioning portions may also extend and protrude along the side face 55 of the radar 5. By providing two or more positioning portions, the position of the radar 5 with respect to the shielding portion 6 can be reliably determined.
According to the present embodiment, the position of the radar 5 with respect to the shielding portion 6 is determined by the positioning portions 9a to 9d formed integrally with the shielding portion 6, and the shielding portion 6 is formed integrally with the globe 12. In this way, at the time when the positioning of the right vehicle lamp 2R with respect to the vehicle 1 is completed, the positioning of the radar 5 with respect to the vehicle 1 is also completed at the same time. Thus, the radar 5 can be positioned with respect to the vehicle 1 relatively easily and reliably, and the radar 5 can be shielded from the outside of the vehicle 1.
(modification example)
Next, the positioning portions 19a to 19d of the modified example will be described below with reference to fig. 6 and 7. Fig. 6 is a horizontal cross-sectional view showing the radar 5, the support member 8, and the shielding portion 6. Fig. 7 is a front view showing positioning portions 19a to 19d, a radar 5, and a shielding portion 6 according to a modification.
As shown in fig. 6 and 7, each of the positioning portions 19a to 19d is configured to come into contact with the support member 8 that supports and fixes the radar 5, thereby determining the position of the support member 8 with respect to the shielding portion 6. In the present modification, since the radar 5 is positioned by the support member 8, the relative positional relationship between the radar 5 and the shielding part 6 is determined as the relative positional relationship between the support member 8 and the shielding part 6 is determined.
Each of the positioning portions 19a to 19d has a recess that abuts against the ribs 18a, 18b protruding from the front surface 82 of the support member 8. At this point, the positioning portion 19a has a recessed portion 94a that abuts against the front face 180a and the side face 182a of the rib 18 a. The positioning portion 19b has a recessed portion 94b that abuts against the front face 180b and the side face 182b of the rib 18 b. The concave portion of each positioning portion abuts on the rib formed on the support member 8, and the position of the support member 8 with respect to the shielding portion 6 can be reliably determined.
In particular, the support member 8 is fixed to the lamp housing 14 via the screws 22 in a state where the positioning portions 19a to 19d are in contact with the support member 8. By using the positioning portions 19a to 19d in this manner, the position of the support member 8 with respect to the shielding portion 6 can be reliably determined.
Each of the positioning portions 19a to 19d is formed integrally with the shielding portion 6 and is disposed between the shielding portion 6 and the radar 5 in the front-rear direction. The positioning portions 19a to 19d may be formed of the same material (e.g., an opaque resin material) as the shielding portion 6. For example, the shielding portion 6 and the positioning portions 19a to 19d may be integrally formed by injection molding using a mold.
As shown in fig. 7, the positioning portion 19a (an example of a first positioning portion) faces the positioning portion 19b (an example of a second positioning portion) in the left-right direction. The radar 5 is arranged between the positioning portions 19a and 19b in the left-right direction. The positioning portion 19c vertically faces the positioning portion 19 a. The positioning portion 19d faces the positioning portion 19b in the vertical direction, and faces the positioning portion 19c in the left-right direction.
In the present modification, the number of positioning portions is also not limited to four. For example, the number of the positioning portions may be two. In this case, it is preferable that one of the two positioning portions faces the other positioning portion via the radar 5 in the left-right direction. One of the two positioning portions may extend and protrude along the side surface 182a of the rib 18a of the support member 8, and the other of the two positioning portions may extend and protrude along the side surface 182b of the rib 18b of the support member 8.
According to the present embodiment, the position of the support member 8 with respect to the shielding portion 6 is determined by the shielding portion 6 by the positioning portions 19a to 19d formed integrally therewith. The shielding portion 6 is formed integrally with the globe 12, and the radar 5 is fixed by the support member 8. In this way, at the time when the positioning of the right vehicle lamp 2R with respect to the vehicle 1 is completed, the positioning of the radar 5 with respect to the vehicle 1 is also completed at the same time. Thus, the radar 5 can be positioned with respect to the vehicle 1 relatively easily and reliably, and the radar 5 can be shielded from the outside of the vehicle 1.
While the embodiments of the present invention have been described above, 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 those skilled in the art will understand 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 invention described in the claims and the equivalent scope thereof.
Claims (11)
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
a positioning portion configured to abut against the radar and determine a position of the radar with respect to the shielding portion,
the shielding part is integrally formed with the lamp housing,
the positioning portion is formed integrally with the shielding portion and is disposed between the shielding portion and the radar.
2. The vehicular lamp according to claim 1,
the radar has:
a front face;
a rear face located on an opposite side of the front face; and
a side surface located between the front surface and the rear surface,
the positioning portion has a concave portion that abuts against a front surface and a side surface of the radar.
3. The vehicular lamp according to claim 1 or 2,
the positioning part has:
a first positioning portion; and
a second positioning portion arranged to be opposed to the first positioning portion,
the radar is disposed between the first positioning portion and the second positioning portion.
4. The vehicular lamp according to claim 1,
the radar is disposed outside the lamp chamber.
5. The vehicular lamp according to claim 1,
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.
6. The vehicular lamp according to claim 1,
the distance between the shielding part and the radar is 20mm to 100 mm.
7. 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;
a support member configured to support and fix the radar; and
a positioning portion configured to abut against the support member and determine a position of the support member with respect to the shielding portion,
the shielding part is integrally formed with the lamp housing,
the positioning portion is formed integrally with the shielding portion and is disposed between the shielding portion and the support member.
8. The vehicular lamp according to claim 7,
the radar is disposed outside the lamp chamber.
9. The vehicular lamp according to claim 7,
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.
10. The vehicular lamp according to claim 7,
the distance between the shielding part and the radar is 20mm to 100 mm.
11. A vehicle provided with the vehicular lamp according to any one of claims 1 to 10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019138205 | 2019-07-26 | ||
| JP2019-138205 | 2019-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303578A true CN112303578A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010721864.8A Pending CN112303578A (en) | 2019-07-26 | 2020-07-24 | Vehicle lamp and vehicle |
| CN202021492527.8U Active CN212746304U (en) | 2019-07-26 | 2020-07-24 | Vehicle lamp and vehicle |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021492527.8U Active CN212746304U (en) | 2019-07-26 | 2020-07-24 | Vehicle lamp and vehicle |
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| CN112303578A (en) * | 2019-07-26 | 2021-02-02 | 株式会社小糸制作所 | Vehicle lamp and vehicle |
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| CN108302434A (en) * | 2016-08-12 | 2018-07-20 | 株式会社小糸制作所 | Lighting device |
| US20190067827A1 (en) * | 2016-02-23 | 2019-02-28 | Denso Corporation | Antenna apparatus |
| CN212746304U (en) * | 2019-07-26 | 2021-03-19 | 株式会社小糸制作所 | Vehicle lamp and vehicle |
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2020
- 2020-07-24 CN CN202010721864.8A patent/CN112303578A/en active Pending
- 2020-07-24 CN CN202021492527.8U patent/CN212746304U/en active Active
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| JP2002071788A (en) * | 2000-08-30 | 2002-03-12 | Toyota Motor Corp | Radar device mounting method and radar device |
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| JP2006140956A (en) * | 2004-11-15 | 2006-06-01 | Anritsu Corp | In-vehicle antenna |
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|---|---|
| CN212746304U (en) | 2021-03-19 |
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Application publication date: 20210202 |