JP2018037102A - On-vehicle optical transmission/reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle optical transmission/reception device that enables installation to inner surfaces of windshields on vehicles of partial models and also enables installation on vehicles of the other remaining models.SOLUTION: An optical beacon unit 1 is attached to the inside of a vehicle and transmits/receives an optical signal with an optical beacon arranged outside the vehicle. Each PD 31 receives an optical signal from the optical beacon and each LED 32 transmits an optical signal to the optical beacon. A board 30 mounts the PDs 31 and the LEDs 32, and a housing 10 stores the board 30. The housing 10 includes: an instrument panel adhesion surface 51 that can adhere onto an upper surface of the instrument panel of the vehicle so as to allow the PDs 31 and the LEDs 32 to face an optical beacon side; and a windshield adhesion surface 21 that can adhere onto the inner surface of the windshield of the vehicle so as to allow the PDs 31 and the LEDs 32 to face the optical beacon side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an in-vehicle optical transmission / reception apparatus that transmits and receives an optical signal to / from an optical beacon installed inside a vehicle and installed outside the vehicle.

  Conventionally, VICS (registered trademark), which is a system that transmits road traffic information processed in a center in real time and displays the information on an in-vehicle device such as a navigation device, is known. In VICS, two-way communication using a near-infrared optical signal is performed with an in-vehicle optical transceiver mounted on a vehicle by an optical beacon installed on the vehicle's travel path, and the road to the vehicle. Traffic information is provided.

  The in-vehicle optical transceiver includes a light emitting element that transmits an optical signal and a light receiving element that receives the optical signal, and is connected to the communication control apparatus by a cable. Such an in-vehicle optical transceiver is generally installed on the upper surface of an instrument panel or the inner surface of a windshield so as to have a direction suitable for transmission / reception of an optical signal with an optical beacon. In addition, although it is not a vehicle-mounted optical transmission / reception apparatus, the vehicle-mounted antenna apparatus using the linear conductor is known as a vehicle-mounted apparatus installed in a windshield inner surface (refer patent document 1).

Japanese Patent No. 4693815

  By the way, the in-vehicle optical transmission / reception apparatus can be installed on the top surface of the instrument panel so that the orientation is suitable for transmission / reception of optical signals with an optical beacon in many vehicle types. However, if the in-vehicle optical transceiver is installed on the top surface of the instrument panel, the in-vehicle optical transceiver is in contact with the eyes of the user (for example, a vehicle occupant), and the appearance in the vehicle compartment is impaired. For this reason, in recent years, an in-vehicle optical transmission / reception device has been installed on the inner surface of a windshield (for example, on the roof side) that is difficult to touch the occupants of the vehicle.

  However, the degree of inclination of the windshield varies greatly depending on the vehicle type. For this reason, an in-vehicle optical transceiver that can be installed on the inner surface of a windshield is installed in a direction suitable for transmission / reception of an optical signal with an optical beacon with respect to the windshield of a vehicle of a certain vehicle type. Similarly, it is not always installed in a direction suitable for transmission / reception of optical signals with respect to the windshield of a vehicle of a vehicle type. That is, depending on the degree of inclination of the windshield, in other types of vehicles, this in-vehicle optical transceiver is installed out of the direction suitable for transmission / reception of optical signals with optical beacons, making it difficult to communicate with optical beacons. A situation can arise. Therefore, a plurality of types of in-vehicle optical transceivers according to the degree of inclination of the windshield are required, and a common in-vehicle optical transceiver cannot be used for many types of vehicles.

  The present invention has been made in view of these problems, and can be installed on the inner surface of the windshield for some types of vehicles, and can also be installed on other types of vehicles. An object of the present invention is to provide an in-vehicle optical transceiver.

  One aspect of the present invention is an on-vehicle optical transmission / reception device that transmits and receives an optical signal to / from an optical beacon installed in a vehicle interior and installed outside the vehicle. The light receiving element receives an optical signal from the optical beacon, and the light emitting element transmits the optical signal to the optical beacon. The substrate mounts a light receiving element and a light emitting element, and the housing houses the substrate. The housing includes a first adhesive surface that can be adhered to the upper surface of the instrument panel of the vehicle so that the light receiving element and the light emitting element face the optical beacon side, and a front of the vehicle such that the light receiving element and the light emitting element face the optical beacon side. A second adhesive surface that can be adhered to the inner surface of the glass.

  According to such a configuration, for some types of vehicles, the in-vehicle optical transceiver can be installed on the inner surface of the windshield using the second adhesive surface, and the remaining vehicles of the other types. On the other hand, even if it cannot be installed on the inner surface of the windshield, the in-vehicle optical transceiver can be installed on the upper surface of the instrument panel of the vehicle using the first adhesive surface. Therefore, a common vehicle-mounted optical transceiver can be made compatible with a greater number of vehicle types.

  In addition, the code | symbol in the parenthesis described in the claim shows the correspondence with the specific means as described in embodiment mentioned later as one aspect, Comprising: The technical scope of this invention is limited is not.

It is a perspective view which shows schematic structure of the vehicle-mounted optical transmitter / receiver. It is a disassembled perspective view of the vehicle-mounted optical transmitter-receiver. It is a figure showing the schematic cross section in the III-III line of FIG. It is a figure explaining a mode that a cable is hooked to a nail | claw part. It is the elements on larger scale of FIG. It is a figure explaining a mode that a cable is connected to a substrate. It is a figure explaining a mode that a cable is connected to the non-mounting surface of a substrate. It is a figure which shows the irradiation range of the light from LED when it sees from a windshield adhesion surface direction. It is a figure which shows the irradiation range of the light from LED when it sees from the direction where the cable 40 is extended. It is a perspective view which shows the external appearance of the vehicle-mounted optical transmission / reception apparatus when installing an instrument panel adhesion surface as a bottom face. It is a perspective view which shows the external appearance of the vehicle-mounted optical transmitter / receiver seen from the instrument panel adhesion surface. It is a figure showing the schematic cross section in the XII-XII line | wire of FIG. It is a figure explaining that an optical beacon unit can be mounted in both the inner surface of a windshield, and the upper surface of an instrument panel. It is a figure explaining a windshield angle. (A) is a figure which shows an example of the range (communication range) of the windshield angle which can mount an optical beacon unit so that communication with the optical beacon becomes possible, and the distribution of the windshield angle for every vehicle type, b) is a diagram showing an example of a communicable range when the windshield reference angle is 20 degrees.

Embodiments to which the present invention is applied will be described below with reference to the drawings.
[1. Constitution]
An optical beacon unit 1 shown in FIG. 1 is installed in a vehicle interior and performs bidirectional communication using an optical signal in the near-infrared region with an optical beacon installed on a traveling path of the vehicle. . As is well known, the optical beacon is installed above the traveling path of the vehicle so as to perform two-way communication using a near-infrared optical signal with a vehicle existing in a communication zone formed on the traveling path. It is configured. The communication zone is formed at a position before the optical beacon with reference to the traveling direction of the vehicle.

  As shown in FIGS. 1 and 2, the optical beacon unit 1 includes a photodiode (PD) 31, a light emitting diode (LED) 32, a substrate 30, a cable 40, and a housing 10.

  The PD 31 is a light receiving element that receives an optical signal (downlink data) from an optical beacon, and the LED 32 is a light emitting element that transmits an optical signal (uplink data) to the optical beacon. The substrate 30 has wiring patterns formed on both sides (not shown), and the PD 31 and the LED 32 are mounted on the same mounting surface 33. In addition to the PD 31 and the LED 32, the substrate 30 is mounted with a resistor, a capacitor, and the like (not shown).

  One end of the cable 40 is connected to a wiring pattern formed on the opposite mounting surface 34 opposite to the mounting surface 33 of the substrate 30, and the other end is connected to the optical beacon unit via an opening 52 formed in the housing 10. 1 is connected to a communication control device (not shown) provided outside. The communication control device inputs the optical signal (downlink data) received by the PD 31 via the cable 40 and processes the signal, and further generates a signal for transmission (uplink data). The device outputs data to the LED 32 via the cable 40 and transmits the data from the LED 32 toward the optical beacon.

  The housing 10 accommodates a part of the substrate 30 and the cable 40, and is formed of a material capable of transmitting near infrared rays (near infrared region optical signals) and a material that does not transmit near infrared rays. And a lower case 50 formed to mesh with the upper case 20. Moreover, the housing | casing 10 equips the upper case 20 with the windshield adhesive surface 21 which can be adhere | attached on the inner surface of the windshield of a vehicle so that PD31 and LED32 may face the optical beacon side. Furthermore, the housing | casing 10 equips the lower case 50 with the instrument panel adhesion surface 51 which can be adhere | attached on the upper surface of the instrument panel of a vehicle so that PD31 and LED32 may face the optical beacon side. Further, the upper case 20 includes a claw portion 22 that can hook the cable 40 extending from the opening 52 on the outside of the housing 10. A gap formed between the upper case 20 and the lower case 50 functions as the opening 52.

  As shown in FIG. 3, the optical beacon unit 1 has one surface of the double-sided tape 60 bonded to the windshield bonding surface 21 and the other surface of the double-sided tape 60 bonded to the inner surface 71 of the vehicle windshield 70. Accordingly, the inner surface 71 of the windshield 70 is bonded and fixed (installed).

  At this time, the housing 10 has the front glass bonding surface 21 bonded to the inner surface 71 of the windshield 70 and the mounting surface 33 is closer to the vehicle traveling direction than the plane parallel to the windshield bonding surface 21. The substrate 30 is held so as to be inclined with respect to the windshield bonding surface 21. In the present embodiment, as an example, an angle (front) formed by a surface parallel to the windshield bonding surface 21 (indicated by a solid line S1 in FIG. 3) and a mounting surface 33 (indicated by a dashed line in FIG. 3) of the substrate 30. The housing 10 holds the substrate 30 so that θk (referred to as a glass reference angle) is 20 degrees.

  At this time, as shown in FIGS. 4 and 5, the claw portion 22 hooks the cable 40 extending from the opening 52 so as to extend along the inner surface 71 of the windshield 70 in the vehicle roof direction.

  As shown in FIGS. 6 and 7, the cable 40 is formed on the anti-mounting surface 34 at the corner 37 farthest from the opening 52 among the four corners 35 to 38 in the substantially rectangular substrate 30. Connected to the wiring pattern. Since the opening 52 is provided not on the anti-mounting surface 34 side but on the mounting surface 33 side, the cable 40 passes through a notch 39 formed in the corner 35 located on the diagonal line of the corner 37. , It is pulled out from the non-mounting surface 34 side to the mounting surface 33 side.

  Note that the double-sided tape 60 is made of a material that transmits near-infrared rays. In this embodiment, as shown in FIGS. 8 and 9 as an example, the bonding position of the double-sided tape 60 on the windshield bonding surface 21 is the windshield. It overlaps the irradiation range L of light from the LED 32 on the bonding surface 21.

  As shown in FIGS. 10 and 11, the optical beacon unit 1 has one surface of the double-sided tape 61 bonded to the instrument panel bonding surface 51, and the other surface of the double-sided tape 61 is shown in FIG. By being bonded to the upper surface 81 of the instrument panel 80 of the vehicle, it is bonded and fixed (installed) to the upper surface 81 of the instrument panel 80.

  At this time, the housing 10 has a state in which the mounting surface 33 is closer to the vehicle panel than a surface parallel to the instrument panel adhesion surface 51 in a state where the instrument panel adhesion surface 51 is adhered to the upper surface 81 of the instrument panel 80. The board | substrate 30 is hold | maintained so that it may incline with respect to the windshield adhesion surface 21 so that it may face the advancing direction side. In the present embodiment, as an example, an angle (referred to as an instrument panel reference angle) formed by a surface parallel to the instrument panel adhesion surface 51 (shown by a solid line S2 in FIG. 12) and the mounting surface 33 of the substrate 30 is 45 degrees. The housing 10 holds the substrate 30 so that

At this time, the cable 40 extends from the opening 52 in the traveling direction of the vehicle along the upper surface 81 of the instrument panel 80 without being hooked by the claw portion 22.
[2. Action]
With such a configuration, the optical beacon unit 1 (1a) shown in FIG. 13 is installed on the upper surface 81 of the instrument panel 80 by bonding the instrument panel bonding surface 51 to the upper surface 81 of the instrument panel 80. . 13 is installed on the inner surface 71 of the windshield 70 by bonding the windshield bonding surface 21 to the inner surface 71 of the windshield 70. The optical beacon unit 1 (1b) shown in FIG.

  As described above, the degree of inclination of the windshield 70 varies greatly depending on the vehicle type. Here, as shown in FIG. 14, the degree of inclination of the windshield 70 is represented by a windshield angle θf that is an inclination angle of the windshield 70 with respect to the horizontal direction.

FIG. 15A shows, as an example, a distribution of the number of vehicle types for each windshield angle θf for a commercially available vehicle, and shows a general tendency.
Here, the installation possible range shown as the range of the angles θs to θe is an optical beacon unit of a comparative example different from the optical beacon unit 1 of the present embodiment in which the windshield reference angle θk is 0 degree. When installed on the inner surface 71 of the windshield 70, the range of the windshield angle θf in which the optical beacon unit of this comparative example can be installed in a direction suitable for transmission / reception of optical signals with the optical beacon is shown. In addition, it is suitable for transmission / reception of an optical signal with an optical beacon when a vehicle enters a communication zone of an optical beacon formed at a position before the optical beacon with reference to the traveling direction of the vehicle. It means that the optical beacon unit 1 can receive the downlink data with the strength, and the uplink beacon can be received with the optical beacon with the signal strength equal to or higher than a predetermined level.

  In the case of the optical beacon unit of the comparative example, as shown in FIG. 15A, the installable range is located on the side where the windshield angle θf is large. Hereinafter, a vehicle type including the windshield 70 having the windshield angle θf included in the installable range is referred to as an installable vehicle type, and a vehicle type including the windshield 70 having the windshield angle θf not included in the installable range is referred to as an installation inappropriate vehicle type. Shall. In order to increase the number of installable vehicle types in a distribution in which a peak is present on the lower side of the windshield angle θf as shown in FIG. 15A, the installable range shown in FIG. The center may be shifted to the vicinity of the distribution peak. That is, an offset may be added to the windshield angle θf.

  Therefore, in the optical beacon unit 1 of the present embodiment, the vehicle 30 travels more than the surface parallel to the windshield bonding surface 21 when the substrate 30 (mounting surface 33) is installed on the inner surface 71 of the windshield 70. It is held by the housing 10 so as to face the direction side. That is, the substrate 30 (mounting surface 33) is inclined (offset) by the windshield reference angle θk so that the substrate 30 (mounting surface 33) faces the traveling direction side of the vehicle from the plane parallel to the inner surface 71 of the windshield 70. It is held by the housing 10. In this embodiment, as an example, the windshield reference angle θk is set to 20 degrees so that the number of installable vehicle types is the largest in the distribution shown in FIG.

  For reference, the substrate 30 (mounting surface 33) with respect to the inner surface 71 of the windshield 70 when it is assumed that the optical beacon unit of the comparative example having the windshield reference angle θk of 0 degree is installed on the inner surface 71 of the windshield 70. ) Is indicated by a dotted line in FIG. Moreover, the direction of the board | substrate 30 (mounting surface 33) with respect to the inner surface 71 of the windshield 70 when the optical beacon unit 1 (1a) is installed in the inner surface 71 of the windshield 70 is shown by the continuous line in FIG.

  Therefore, compared with the optical beacon unit of the comparative example in which the windshield reference angle θk is 0 degrees, the optical beacon unit 1 of the present embodiment in which the windshield reference angle θk is 20 degrees is more suitable for the front of the vehicle. Installation on the inner surface 71 of the glass 70 becomes possible. The optical beacon unit 1 can be installed on the upper surface 81 of the instrument panel 80 for the remaining vehicle types.

In the present embodiment, as an example, the installation of the inner surface 71 of the windshield 70 of the optical beacon unit 1 is performed so as to satisfy the following requirements (1) to (4).
(1) Various devices such as a drive recorder, a rain sensor, and a DCM antenna can be installed near the center of the windshield 70 on the roof side (for example, the back of the rearview mirror). The optical beacon unit 1 is installed.

  (2) On the periphery of the windshield 70, a fired body of black ceramic paste called black ceramic is formed. Since the black Sera portion does not transmit near-infrared rays, the optical beacon unit 1 must be installed so that the light receiving range of the PD 31 and the light emission range of the LED 32 do not overlap with the black Sera portion.

  (3) Since near-infrared transmission is attenuated by dirt such as water stains adhering to the outer surface of the windshield 70, the light receiving range of the PD 31 and the light emitting range of the LED 32 are included in the wiper wiping range of the windshield. An optical beacon unit 1 is installed.

(4) The optical beacon unit 1 is installed on the inner surface 71 of the windshield 70 in a range within 20% of the upper part in the vertical direction.
[3. effect]
According to the embodiment described above in detail, the following effects can be obtained.

  [3A] The housing 10 has an instrument panel adhesion surface 51 that can be adhered to the upper surface 81 of the vehicle instrument panel 80 so that the PD 31 and the LED 32 face the optical beacon side, and the PD 31 and the LED 32 face the optical beacon side. And a windshield bonding surface 21 that can be bonded to the inner surface 71 of the windshield 70 of the vehicle. Thus, installation on the inner surface 71 of the windshield 70 is possible for some types of vehicles, while installation on the upper surface 81 of the instrument panel 80 is possible for other types of vehicles. It becomes possible.

  [3B] The mounting surface 33 of the board 30 is a traveling direction of the vehicle rather than a plane parallel to the instrument panel adhesion surface 51 in a state where the instrument panel adhesion surface 51 is adhered to the upper surface 81 of the instrument panel 80. It is inclined with respect to the instrument panel bonding surface 51 so as to face the side. That is, in the present embodiment, the mounting surface 33 is inclined toward the traveling direction, so that the optical beacon unit 1 transmits and receives optical signals compared to when the mounting surface 33 is parallel to the upper surface 81 of the instrument panel 80. The direction can be set to a direction suitable for transmission / reception of an optical signal with an optical beacon.

  [3C] The mounting surface 33 of the substrate 30 faces the vehicle traveling direction side of the surface parallel to the windshield bonding surface 21 in a state where the windshield bonding surface 21 is bonded to the inner surface 71 of the windshield 70. Thus, it inclines with respect to the windshield adhesion surface 21. That is, in this embodiment, by tilting the mounting surface 33 toward the traveling direction, the mounting surface 33 can be directed toward the optical beacon compared to when the mounting surface 33 is parallel to the windshield 70. . Accordingly, the optical beacon unit 1 can be installed on the inner surface 71 of the windshield 70 in a larger number of vehicle models on the premise of the distribution of the windshield angle for each vehicle model (FIG. 15A). .

  [3D] The cable 40 has one end connected to the substrate 30 and the other end extending to the outside through an opening 52 formed in the housing 10. The housing 10 is formed with a claw portion 22 capable of hooking the cable 40 extending from the opening 52 outside the housing 10. The claw portion 22 has a cable 40 extending from the opening 52 in a direction along the instrument panel adhesion surface 51 in a state where the claw portion 22 is not hooked to the claw portion 22, and is different from the direction along the instrument panel adhesion surface 51. It latches so that it may extend in the direction along the glass bonding surface 21. According to this, it is possible to prevent the cable 40 from floating from the upper surface 81 of the instrument panel 80 by placing the cable 40 along the instrument panel bonding surface 51 without being hooked by the claw portion 22. Further, the cable 40 can be prevented from floating from the inner surface 71 of the windshield 70 by placing the cable 40 along the windshield bonding surface 21 while being hooked on the claw portion 22. That is, by preventing the cable 40 from floating from the upper surface 81 of the instrument panel 80 or the inner surface 71 of the windshield 70, it is possible to prevent the cable 40 from being damaged due to, for example, catching.

  [3E] The cable 40 is connected to the corner 37 farthest from the opening 52 among the corners 35 to 38 in the substrate 30. According to this, since the cable 40 can be gently bent by arranging the corner 37 to which the cable 40 is connected and the opening 52 as far as possible, the stress acting on the cable 40 can be reduced. .

  The [3F] opening 52 is provided on the mounting surface 33 side opposite to the non-mounting surface 34 to which the cable 40 in the substrate 30 is connected. According to this, since the cable 40 can be secured by routing the cable 40 from the non-mounting surface 34 side of the substrate 30 to the mounting surface 33 side, the cable 40 can be gently bent and acts on the cable 40. Stress to be reduced.

  [3G] The instrument panel adhesion surface 51 is adhered to the inner surface 71 of the windshield 70 by a double-sided tape 60 using a material that transmits near infrared rays. That is, even if the double-sided tape 60 having a size that overlaps the irradiation range L of the light from the LED 32 on the front glass bonding surface 21, the optical signal (near infrared rays) passes through the double-sided tape 60. Attenuation (inhibition) is suppressed. According to this, since the double-sided tape 60 can be bonded to a wide range of the windshield bonding surface 21, the optical beacon unit 1 can be firmly bonded and fixed to the inner surface 71 of the windshield 70.

  In this embodiment, the optical beacon unit 1 corresponds to an example of an in-vehicle optical transceiver, the PD 31 corresponds to an example of a light receiving element, the LED 32 corresponds to an example of a light emitting element, and the instrument panel adhesive surface 51 It corresponds to an example of a first adhesive surface, and the windshield adhesive surface 21 corresponds to an example of a second adhesive surface. The double-sided tape 60 corresponds to an example of a double-sided adhesive tape. Furthermore, the direction toward the traveling direction of the vehicle along the instrument panel bonding surface 51 corresponds to an example of “first direction”, and the direction toward the roof side of the vehicle along the windshield bonding surface 21 is “first”. It corresponds to an example of “direction of 2”.

[4. Other Embodiments]
As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention can take a various form, without being limited to the said embodiment.

  [4A] In the above embodiment, as an example for the distribution of the windshield angle for each vehicle type (FIG. 15A), the windshield reference angle θk is set to 20 degrees, and the instrument panel reference angle is set to 45 degrees. However, the present invention is not limited to this, and the windshield reference angle θk and the instrument panel reference angle may be set to arbitrary angles.

  [4B] In the above embodiment, the claw portion 22 holds the cable 40 in a state where it is not hooked to the claw portion 22 so as to extend from the opening 52 in a direction along the instrument panel bonding surface 51, and Although the cable 40 is held in a state of being hooked to the claw portion 22 so as to extend in the direction along the glass bonding surface 21, the present invention is not limited thereto. For example, the claw part 22 holds the cable 40 in a state of being hooked on the claw part 22 so as to extend in a direction along the instrument panel adhesion surface 51 from the opening 52, and extends along the windshield adhesion surface 21. You may hold | maintain the cable 40 in the state which is not latched by the said nail | claw part 22 so that it may extend in a direction.

  [4C] In the above embodiment, the cable 40 is connected to the corner 37 of the substrate 30 farthest from the opening 52. However, the cable 40 is not limited to this, and may be connected to other corners of the substrate 30. Good. The cable 40 may be connected to a portion other than the corner portion of the substrate 30.

  [4D] In the above embodiment, the opening 52 is provided on the mounting surface 33 side of the substrate 30 opposite to the mounting surface 34 to which the cable 40 is connected. It may be provided on the side.

  [4E] In the above embodiment, the double-sided tape 60 is made of a material that transmits near-infrared rays, but is not limited thereto, and may be made of a material that does not transmit near-infrared rays. . In this case, the optical beacon unit 1 is attached to the windshield 70 while suppressing the attenuation (inhibition) of the optical signal by using a double-sided tape on the portion of the windshield adhesive surface 21 that is difficult to overlap the light irradiation range L from the LED 32. The inner surface 71 can be adhered and fixed.

  [4F] In the above embodiment, two PDs 31 are arranged on the left side and two LEDs 32 are arranged on the right side when viewed from the upper case 20 side of the optical beacon unit 1, but the present invention is not limited to this. Any number may be installed at any position.

  [4G] The functions of one constituent element in the above embodiment may be distributed as a plurality of constituent elements, or the functions of a plurality of constituent elements may be integrated into one constituent element. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment as long as a subject can be solved. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Optical beacon unit 10 ... Housing 21 ... Front glass adhesion surface 22 ... Nail | claw part 30 ... Board | substrate 33 ... Mounting surface 40 ... Cable 51 ... Instrument panel adhesion surface 52 ... Opening 60 ... Double-sided tape 70 ... Windshield 80 ... Instrument Panel.

Claims (7)

An in-vehicle optical transmission / reception device (1) that is installed in a vehicle interior and transmits / receives an optical signal to / from an optical beacon installed outside the vehicle,
A light receiving element (31) for receiving an optical signal from the optical beacon;
A light emitting element (32) for transmitting an optical signal to the optical beacon;
A substrate (30) on which the light receiving element and the light emitting element are mounted;
A housing (10) for housing the substrate;
With
The housing includes a first bonding surface (51) that can be bonded to an upper surface of an instrument panel of the vehicle so that the light receiving element and the light emitting element face the optical beacon side, and the light receiving element and the light emitting element include A vehicle-mounted optical transceiver comprising: a second bonding surface (21) that can be bonded to the inner surface of the windshield of the vehicle so as to face the optical beacon side. The in-vehicle optical transceiver according to claim 1,
The substrate has the light receiving element and the light emitting element mounted on the same mounting surface (33),
In the state where the first adhesive surface is adhered to the upper surface of the instrument panel, the mounting surface is arranged so as to face the traveling direction side of the vehicle rather than a surface parallel to the first adhesive surface. An in-vehicle optical transmitter / receiver characterized by being provided to be inclined with respect to the first adhesive surface. The in-vehicle optical transceiver according to claim 1 or 2,
The substrate has the light receiving element and the light emitting element mounted on the same mounting surface,
The mounting surface has the second adhesive surface bonded to the inner surface of the windshield so that the mounting surface faces the traveling direction side of the vehicle with respect to a surface parallel to the second adhesive surface. An in-vehicle optical transmitter / receiver characterized by being provided to be inclined with respect to the adhesive surface of the vehicle. It is an in-vehicle optical transceiver according to any one of claims 1 to 3,
An in-vehicle optical transceiver comprising: a cable (40) having one end connected to the substrate and the other end extending to the outside through an opening (52) formed in the housing. The in-vehicle optical transceiver according to claim 4,
The cable is connected to the corner farthest from the opening among the corners of the substrate. An in-vehicle optical transceiver according to claim 4 or claim 5,
The said opening is provided in the surface side on the opposite side to the surface where the said cable is connected in the said board | substrate. The vehicle-mounted optical transmitter / receiver characterized by the above-mentioned. The on-vehicle optical transceiver according to any one of claims 1 to 6,
The in-vehicle optical transmission / reception device, wherein the second adhesive surface is adhered to the inner surface of the windshield by a double-sided adhesive tape (60) using a material that transmits near infrared rays.