WO2023166860A1 - Radome for vehicle-mounted radar device, and method for manufacturing same - Google Patents

Radome for vehicle-mounted radar device, and method for manufacturing same Download PDF

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Publication number
WO2023166860A1
WO2023166860A1 PCT/JP2023/000673 JP2023000673W WO2023166860A1 WO 2023166860 A1 WO2023166860 A1 WO 2023166860A1 JP 2023000673 W JP2023000673 W JP 2023000673W WO 2023166860 A1 WO2023166860 A1 WO 2023166860A1
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WO
WIPO (PCT)
Prior art keywords
heater wire
base material
resin base
connection end
wire
Prior art date
Application number
PCT/JP2023/000673
Other languages
French (fr)
Japanese (ja)
Inventor
杵鞭孝弘
古林宏之
Original Assignee
三恵技研工業株式会社
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Filing date
Publication date
Application filed by 三恵技研工業株式会社 filed Critical 三恵技研工業株式会社
Publication of WO2023166860A1 publication Critical patent/WO2023166860A1/en

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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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the present invention relates to a radome for a vehicle-mounted radar device provided on the front side of the vehicle-mounted radar device, and more particularly to a radome for a vehicle-mounted radar device having a snow-melting function and a manufacturing method thereof.
  • a radome for an in-vehicle radar device having a snow-melting function a radome in which a heater wire is arranged so as to suppress a decrease in transmission performance of millimeter waves is known.
  • a radome is disclosed in Patent Document 1.
  • Patent Document 1 There is a radome.
  • This radome is composed of a front base material made of resin and a rear base material made of resin.
  • a groove is formed in the surface of the front base material. It is wired so that it can be stored.
  • a transparent film is provided on the surface of the front base material so as to cover the heater wire housed in the groove, and is pressed against the front base material. (see FIG. 6, paragraphs [0042], [0044] to [0046] of Patent Document 1).
  • the heater wire is wired along the grooves formed in the resin base material of the radome for automotive radar equipment, and another structure that secures the weather resistance, corrosion resistance, and scratch resistance of the heater wire is formed on one of the resin base materials.
  • the heater wire is wired along the groove, and the other resin base material is laminated and fixed to the surface of one resin base material on the side of the heater wire wiring, and the heater wire is connected to the one resin base material and the other resin base material.
  • a structure in which it is embedded between the material is conceivable.
  • the radome In the case of a radome of this structure, it is necessary to join the connection end of the heater wire wired to one resin base material to the wire harness connection terminal for conductive connection before fixing the other resin base material. . It is desirable that the radome has a structure capable of easily and reliably joining the connection end portion of the heater wire and the wire harness connection terminal.
  • the present invention is proposed in view of the above problems, and in a radome structure in which one resin base material is laminated and fixed to the surface of the other resin base material on the heater wire wiring side, the connection end portion of the heater wire and the wire It is an object of the present invention to provide a radome for an in-vehicle radar device which can be easily and reliably joined to a harness connection terminal and which can reduce manufacturing costs, and a method of manufacturing the same.
  • a radome for an in-vehicle radar device of the present invention includes a heater wire wired in the surface direction of an electromagnetic wave transparent substrate, and is formed by stacking and fixing a first resin base material and a second resin base material.
  • the substrate is configured, the heater wire wired along the groove is embedded between the first resin base material and the second resin base material, and at least one connection end portion of the heater wire is composed of a proximity wiring region in which the heater wire is wired in close proximity, a wire harness connection terminal is placed on one connection end of the heater wire, and one connection end of the heater wire and the
  • the wire harness connection terminal is fixed by a joint made of a conductive joint material, and the joint is embedded in the base.
  • connection end of the heater wire wired to the first resin base material or the second resin base material and the wire harness connection can be placed and joined to the adjacent wiring area where the heater wire is wired close to the heater wire and the electrical connection range is widened when joining the terminal and conducting connection.
  • the connection end of the wire and the wire harness connection terminal can be joined and electrically connected easily and reliably.
  • the connection end of the heater wire and the wire harness connection terminal can be electrically connected and joined, reducing manufacturing costs. can do.
  • the connection ends of the heater wires, and the wire harness connection terminals are sealed inside the base body composed of the first resin base material and the second resin base material, It is possible to secure waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire and the connecting portion of the heater wire.
  • each of one connection end portion and the other connection end portion of the heater wire is constituted by a close wiring region in which the heater wire is wired in close proximity, and the heater wire
  • One wire harness connection terminal is placed on one connection end of the heater wire
  • another wire harness connection terminal is placed on the other connection end of the heater wire
  • one connection end of the heater wire and the One wire harness connection terminal is fixed by a first joint made of a conductive joint material
  • the other connection end of the heater wire and the other wire harness connection terminal are made of a conductive joint material. and the first joint and the second joint are embedded in the base.
  • both the joining of one connection end portion of the heater wire and the one wire harness connection terminal and the joining of the other connection end portion of the heater wire and the other wire harness connection terminal can be easily and reliably performed. It can be carried out. Moreover, since both connection end portions of the heater wire and the wire harness connection terminal can be electrically connected and joined, the manufacturing cost can be further reduced. In addition, it is possible to ensure the waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire and the connecting portion of both heater wires.
  • the adjacent wiring region is formed by wiring the heater wire in a meandering manner, or by wiring the heater wire in a spiral manner. Characterized by According to this, it is possible to more reliably widen the electrical connection range of the adjacent wiring region configured by the adjacent wiring region in which the heater wires are wired so as to be close to each other, and the connection end portion of the heater wire and the wire harness can be connected. Joining with terminals and electrical connection can be performed more reliably.
  • a radome for a vehicle-mounted radar device is characterized in that a coating resin is formed so as to cover the joint portion, and the coating resin is embedded in the base.
  • a coating resin is formed so as to cover the joint portion, and the coating resin is embedded in the base.
  • a method for manufacturing a radome for a vehicle-mounted radar device according to the present invention is a method for manufacturing a radome for a vehicle-mounted radar device according to the present invention, wherein A first step of forming grooves in a predetermined pattern on a surface to form grooves adjacent to locations corresponding to the adjacent wiring regions, and wiring heater wires along the grooves so that the heater wires are adjacent to each other.
  • a connection terminal is placed, and the one connection end portion and the one wire harness connection terminal are fixed with a conductive bonding material to form a first joint portion, and the other connection end of the heater wire is formed.
  • the second resin base material is formed by injection molding and fixed to the first resin base material, and the heater wire is provided between the first resin base material and the second resin base material and a fourth step of embedding the one wire harness connection terminal, the first joint portion, the other wire harness connection terminal, and the second joint portion.
  • grooves of a predetermined pattern having grooves close to locations corresponding to the adjacent wiring regions are formed on the surface of the first resin base material, and the heater wires are wired along the grooves, thereby making it easy to perform wiring. It is possible to form one connection end and the other connection end of the heater wire configured in the adjacent wiring region.
  • the insulating coating of one connection end of the heater wire and the insulation of the other connection end of the heater wire with a conductive bonding material in a molten state due to heating in the third step, the insulating coating of one connection end of the heater wire and the insulation of the other connection end of the heater wire with a conductive bonding material in a molten state due to heating.
  • the one connection end and the one wire harness connection terminal are fixed with a conductive bonding material whose temperature has been removed after the coating is removed, and the other connection end and the other wire harness connection terminal are fixed. It is characterized by sticking. According to this, even when wiring is performed using a heater wire coated with an insulation, the insulation coating of the connection end portion of the heater wire can be removed with the conductive bonding material in a molten state.
  • the connection end of the heater wire and the wire harness connection terminal can be joined and electrically connected without removing the insulating coating in advance. Therefore, it is possible to streamline the manufacturing process of the radome for a vehicle-mounted radar device
  • the connection end portion of the heater wire and the wire harness connection terminal can be easily and reliably joined, and the manufacturing cost can be reduced.
  • FIG. 2 is a partially enlarged front view of FIG. 1;
  • FIG. 3 is an enlarged view of the periphery of the adjacent wiring area in FIG. 2;
  • FIG. 4 is a partially enlarged front view showing the periphery of the adjacent wiring region between the first resin base material and the heater wire in the radome for the vehicle-mounted radar device of the embodiment.
  • 1 is a longitudinal sectional view of a radome for a vehicle-mounted radar device according to an embodiment;
  • FIG. 4 is an explanatory view showing a state in which the first resin base material, the heater wire, the wire harness connection terminals, and the joint portion in the radome for the vehicle-mounted radar device of the embodiment are arranged inside the mold.
  • (a) to (c) are process explanatory diagrams for explaining a process of joining a connection end portion of a heater wire and a wire harness connection terminal of a modified example using a heater wire coated with insulation.
  • FIG. 11 is a partially enlarged front view of a radome for an in-vehicle radar device having a close wiring area according to a modification
  • a radome 1 for a vehicle-mounted radar device is used, for example, as a bumper cover attached to a bumper of a vehicle.
  • the substrate 2 is composed of, for example, a first resin base material 3 arranged on the side opposite to the viewing side, and a second resin base material 4 arranged on the viewing side, which is the front side of the first resin base material 3 .
  • the first resin base material 3 and the second resin base material 4 are laminated and fixed.
  • the first resin base material 3 and the second resin base material 4 are each made of an insulating and electromagnetic wave transmitting synthetic resin.
  • first resin base material 3 and the second resin base material 4 Different kinds of synthetic resins or the same kind of synthetic resin can be used for the first resin base material 3 and the second resin base material 4, and the refractive indices n defined based on the complex dielectric constant match each other.
  • forming the first resin base material 3 and the second resin base material 4 with materials having substantially the same or close refractive index n is preferable from the viewpoint of improving the transmission performance of electromagnetic waves.
  • the difference in refractive index between the first resin base material 3 and the second resin base material 4 is 0 to 10. % range is good.
  • the refractive index n is a quantity defined by Equation 1 from the real part of relative permittivity ⁇ r′ and the imaginary part of relative permittivity ⁇ r′′. It is preferable that the magnitude of the dielectric loss tangent (loss tangent) tan ⁇ defined as 2 is 0.1 or less, and the magnitude of the real part of the relative permittivity is preferably 3 or less. By setting the real part size to these values or less, it is possible to ensure the reflectivity and internal loss reduction required for the radome.
  • the synthetic resin of the first resin substrate 3 and the synthetic resin of the second resin substrate 4 it is possible to use an appropriate synthetic resin within the scope of the present invention.
  • PMMA polycarbonate
  • ABS acrylonitrile-butadiene-styrene copolymer
  • ASA acrylonitrile-styrene-acrylate copolymer
  • AES acrylonitrile-ethylene propyl rubber-styrene copolymer
  • PP polypropylene
  • a foam may be used for these synthetic resins.
  • the ratio of the thickness of the first resin base material 3 to the thickness of the second resin base material 4 are determined by the in-vehicle radar. Any material may be used as long as the device radome 1 can ensure the required electromagnetic wave permeability.
  • a heater wire 5 is wired in the plane direction of the electromagnetic wave transparent substrate 2 in the radome 1 for an in-vehicle radar device.
  • the conductive material constituting the heater wire 3 it is possible to use an appropriate conductive material within the scope of the present invention, such as copper, silver, silver-plated copper, copper-silver alloy, copper-nickel alloy, A nickel-chromium alloy, an iron-chromium alloy, a transparent conductive film such as an ITO film, carbon fiber, or the like is preferable.
  • a wire material, conductive ink, conductive filler, or the like can be used.
  • the heater wire 5 of the illustrated example is formed by winding along the direction in which the substrate 2 expands in the main part of the plate-shaped substrate 2, and is wired so as to turn back and extend in a series.
  • the straight portions of the heater wires 5 are arranged in parallel along the surface direction of the substrate 2 with an interval therebetween, and the directions of the currents flowing in the straight portions of the adjacent heater wires 5 are substantially mutually. It is set to be anti-parallel or anti-parallel.
  • the heater wire 5 is embedded between the first resin base material 3 and the second resin base material 4 and sandwiched between the first resin base material 3 and the second resin base material 4. In this way, it is embedded and sealed in the base body 2 composed of the first resin base material 3 and the second resin base material 4 .
  • a groove 31 is formed on the surface of the first resin base material 3 to be fixed to the second resin base material 4 , so that the second resin base material 4 is fixed to the first resin base material 3 .
  • Another groove 41 is formed on the face side so as to face the groove 31 , and the heater wire 5 is inserted into the groove 31 of the first resin base material 3 and the another groove 41 of the second resin base material 4 . It is fitted and wired along the grooves 31 and 41 (see FIG. 5).
  • the heater wire 5 is wired along only the groove 31 of the first resin base material 3 or the groove 41 of the second resin base material 4, and the second resin base material 4 or the first resin base material is connected.
  • 3 may have a configuration in which a groove for wiring the heater wire is not formed.
  • Both ends of the heater wire 5 are extended in a region other than the electromagnetic wave transmission region R of the substrate 2, which is the region of the tab 21 formed to protrude sideways in this embodiment.
  • One connection end 51 and the other connection end 52 are provided.
  • Each of one connection end portion 51 and the other connection end portion 52 of the heater wire 5 is constituted by a proximity wiring region 53 in which the heater wire 5 is wired in proximity. are formed by closely wiring the heater wires 5 in a meandering manner.
  • the heater wire 5 in the adjacent wiring region 53 is also fitted in the groove 31 of the first resin base material 3 and another groove 41 of the second resin base material 4 and wired along the grooves 31 and 41. ing.
  • One wire harness connection terminal 61 is mounted on one connection end portion 51 of the heater wire 5, and the conductive one connection end portion 51 of the heater wire 5 and the one wire harness connection terminal 61 are in contact with each other. are placed. Then, one connection end portion 51 of the heater wire 5 and one wire harness connection terminal 61 are fixed by a first joint portion 71 made of a conductive bonding material, and the one connection end portion 51 of the heater wire 5 and The one wire harness connection terminal 61 and the first joint portion 71 are joined so as to be uniform, and the one conductive connection end portion 51 of the heater wire 5 and the one wire harness connection terminal 61 are electrically connected.
  • Solder, brazing material, conductive adhesive (ECA), anisotropic conductive paste (ACP), or the like is preferably used as the conductive bonding material forming the first bonding portion 71 .
  • Another wire harness connection terminal 62 is placed on the other connection end portion 52 of the heater wire 5, and the other conductive connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are in contact with each other. are placed. Then, the other connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are fixed by a second joint portion 72 made of a conductive bonding material, and the other connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are fixed.
  • the other wire harness connection terminal 62 and the second joint portion 72 are joined so as to be uniform, and the other conductive connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are electrically connected.
  • solder brazing material, conductive adhesive (ECA), anisotropic conductive paste (ACP), or the like for the conductive bonding material forming the second bonding portion 72 as well.
  • the line width of the adjacently wired heater wire 5 is preferably 0.03 mm to 3 mm, more preferably 0.03 mm to 0.5 mm.
  • the space between the heater wires 5 that are wired is preferably 0 mm to 5 mm, or the space between the heater wires 5 that are closely wired is preferably less than the radius of the heater wires 5, and the heater wires 5 are closely wired.
  • the area coverage of the heater wire 5 is preferably 100% to 10%, more preferably 100% to 66%.
  • connection ends 51 and 52 of the heater wires 5 and the wire harness connection terminals 61 and 62 can be electrically connected.
  • the first resin base material 3 (or It is possible to prevent the second resin base material 4) from being damaged by heat.
  • the radome 1 for a vehicle-mounted radar device of the present embodiment is constructed by embedding and sealing in a base 2 composed of a resin base material 3 and a second resin base material 4 .
  • grooves 31 are formed in a predetermined pattern on the surface of the first resin base material 3 on which the second resin base material 4 is laminated. Proximity grooves 31 are formed at locations corresponding to proximate wiring regions 53 (see FIG. 6A).
  • the grooves 31 are formed by forming the first resin base material 3 by, for example, forming the first resin base material 3 by means of projections or ridges having shapes corresponding to the grooves 31 in the mold when forming the first resin base material 3 by injection molding. It is preferable to form them at the same time, or it is preferable to form them by cutting or the like on one side of the first resin base material 3 already formed by injection molding or the like.
  • the heater wires 5 are wired in a predetermined pattern along the grooves 31 formed in the first resin base material 3 , and the heater wires 5 are proximately wired along the grooves 31 at locations corresponding to the proximity wiring regions 53 . Then, one connection end portion 51 and the other connection end portion 52 of the heater wire 5, which is constituted by the adjacent wiring region 53 in which the heater wire 5 is wired close to each other, are formed (see FIG. 6(b)).
  • the heater wire 5 in this embodiment is fitted in the groove 31 so that a part of it protrudes outside the groove 31, and is fixed to the first resin base material 3 by welding or adhesion, for example, for wiring.
  • one wire harness connection terminal 61 is placed on one connection end portion 51 of the heater wire 5, and the one connection end portion 51 and the one wire harness connection terminal 61 are fixed with a conductive bonding material.
  • a first joint portion 71 is formed, one connection end portion 51 and one wire harness connection terminal 61 are electrically connected, and the other wire harness connection terminal 62 is connected to the other connection end portion 52 of the heater wire 5.
  • the other connection end portion 52 and the other wire harness connection terminal 62 are fixed with a conductive bonding material to form a second joint portion 72, and the other connection end portion 52 and the other wire harness are fixed. It is electrically connected to the connection terminal 62 (see FIGS. 6(c) and 6(d)).
  • the first resin base material 3 to which the heater wire 5, the wire harness connection terminals 61 and 62, and the joint portions 71 and 72 are attached is placed inside the mold 100 composed of a split mold. Deploy. At this time, the wire harness connection portion 6 from which the wire harness connection terminals 61 and 62 are drawn out is led out of the mold 100 through an outlet 102 formed in a part of the mold 100 .
  • injection molding is performed by pouring molten resin MR into the mold 100 from the inlet 101 of the mold 100, and injection molding is performed on the side of the first resin base material 3 on which the joint portions 71 and 72 are formed. Then, the second resin base material 4 is formed, and the second resin base material 4 is fixed to the first resin base material 3 .
  • the interface of the second resin base material 4 laminated by injection molding includes the first resin base material 3, the heater wire 5, one connection end portion 51, one wire harness connection terminal 61, the first joint portion 71, The other connection end portion 52, the other wire harness connection terminal 62, and the second joint portion 72 are molded and welded, and between the first resin base material 3 and the second resin base material 4, the heater wire 5, One connection end portion 51, one wire harness connection terminal 61, a first joint portion 71, the other connection end portion 52, another wire harness connection terminal 62, and a second joint portion 72 are embedded.
  • the second resin base material 4 is formed so as to cover the portion of the heater wire 5 protruding outside the groove 31, the portion of the heater wire 5 protruding outside the groove 31 is covered with the second resin base material 4.
  • the heater wire 5 is molded and fixed to the base material 4 by insert molding, and the heater wire 5 is fitted in another groove 41 of the second resin base material 4 .
  • the second resin base material 4 is not limited to the configuration formed by injection molding, and may be fixed to the first resin base material 3 by adhesion or the like as necessary. After the second resin base material 4 is formed, the mold 100 is demolded to obtain the radome 1 for a vehicle-mounted radar device of the present embodiment.
  • the first resin base material 3 (or the second resin base material 4) is wired before the second resin base material 4 (or the first resin base material 3) is fixed.
  • the first resin base material 3 (or the second resin base material 4) is wired.
  • the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 are joined and electrically connected, the heater wire 5 is wired so as to be close to each other to widen the electrical connection range.
  • the wire harness connection terminals 61 and 62 can be placed and joined to the region 53, and the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 can be joined and electrically connected easily and reliably. can be done.
  • connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 are electrically connected without using a separate member such as a metal plate for expanding the electrical connection range of the heater wire 5, for example. Since it can be joined, the manufacturing cost can be reduced.
  • the heater wire 5 to be wired, the connection ends 51 and 52 of the heater wire 5, and the wire harness connection terminals 61 and 62 are made of the first resin base material 3 and the second resin base material 4, respectively. Since the heater wire 5 is sealed inside, waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire 5 and the connecting portion of the heater wire 5 can be ensured.
  • the electrical connection range of the adjacent wiring region 53 can be widened more reliably, and the connection end portion 51 of the heater wire 5 can be expanded. , 52 and the wire harness connection terminals 61, 62 can be more reliably joined and electrically connected.
  • the surface of the first resin base material 3 is provided with a predetermined pattern of grooves 31 having grooves 51 close to locations corresponding to the adjacent wiring regions 53.
  • the heater wire 5 By wiring the heater wire 5 along this groove 31, one connection end portion 51 and the other connection end portion 52 of the heater wire 5 constituted by the adjacent wiring region 53 can be easily formed. can be done.
  • the heater wire wired in the radome for a vehicle-mounted radar device of the present invention is not limited to a heater wire that has no insulation coating as a whole, and may be a heater wire that has an insulation coating except for the portion that is conductively connected to the wire harness connection terminal. good.
  • the heater wires 5a are closely wired along the grooves 31, and one connection end portion 51i in the state of insulation covering and the connection of the other are constituted by the proximity wiring regions 53 in which the heater wires 5a are wired so as to be close to each other.
  • An end portion 52i is formed (see FIG. 8(a)).
  • one wire harness connection terminal 61 is placed on one connection end portion 51i of the heater wire 5a which is insulated and covered, and is heated and melted.
  • the insulating coating of one connecting end portion 51i is removed with a conductive bonding material, and the one connecting end portion 51a with the conductive material exposed from the insulating coating and the one wire harness connecting terminal 61 are separated by the conductive bonding material whose temperature has decreased. are fixed to form a first joint portion 71, and one connection end portion 51a and one wire harness connection terminal 61 are electrically connected.
  • another wire harness connection terminal 62 is placed on the other connection end portion 52i of the heater wire 5a, which is in an insulation-coated state, and the other connection end portion 52i is insulation-coated with a conductive bonding material that is heated and melted. is removed, and the other connection end portion 52a where the conductive material is exposed from the insulating coating is fixed to the other wire harness connection terminal 62 by a conductive bonding material whose temperature has been lowered to form the second bonding portion 72. , the other connection end portion 52a and another wire harness connection terminal 62 are electrically connected.
  • the manufacturing process similar to that of the above-described embodiment is performed to obtain the radome 1 for an in-vehicle radar device.
  • connection ends 51i and 52i of the heater wire 5a can be removed with the conductive bonding material in a molten state.
  • the connection ends 51a and 52a of the heater wire 5a and the wire harness connection terminals 61 and 62 can be joined and electrically connected without previously removing the insulating coating before wiring the heater wire 5a. Therefore, the efficiency of the manufacturing process of the radome 1 for a vehicle-mounted radar device in which the heater wire 5a coated with insulation is wired can be made more efficient.
  • a first covering resin 81 b is formed to cover and protect a second joint portion 72 that joins the other connection end portion 52 of the heater wire 5 and another wire harness connection terminal 62 . It is also possible to form the first coating resin 82b and embed the first coating resin 81b and the second coating resin 82b in the substrate 2.
  • the second resin base material 4 (or Alternatively, when the first resin base material 3) is formed by injection molding, for example, the joints can be protected by the coating resins 81b and 82b, and peeling or disconnection occurs at the joints due to resin pressure during injection molding. can be prevented.
  • proximity wiring is provided as shown in FIG. A configuration in which the region 53c is formed by closely wiring the heater wire 5 in a spiral shape is also suitable.
  • one side of the heater wire 5 is connected to the area of the tab 21 formed to protrude laterally, which is the area other than the electromagnetic wave transmission area R of the substrate 2, and is formed by the spiral adjacent wiring area 53c.
  • An end portion 51c and the other connection end portion 52c are provided.
  • one connection end portion 51c of the heater wire 5 and one wire harness connection terminal 61 are fixed at the first joint portion 71 and electrically connected, and the other connection end portion 52c of the heater wire 5 is connected.
  • the other wire harness connection terminal 62 is fixed at the second joint portion 72 to be conductively connected.
  • the line width of the heater wires 5 that are closely wired, the interval between the heater wires 5 that are closely wired, and the area occupancy of the heater wires 5 that are closely wired are the same as in the proximity wiring region of the above-described embodiment. 53 is preferably set.
  • the spiral shape of the adjacent wiring region 53c may be a wholly substantially square spiral shape or a substantially triangular wholly spiral shape, in addition to the generally circular spiral shape.
  • the adjacent wiring regions 53, 53c, etc. constituting the connection end portions 51, 52, etc. of the radome 1 for an in-vehicle radar device are formed on the planar portion of the first resin base material 3 (or the second resin base material 4). In addition to forming, it may be configured to be formed on the curved surface portion of the first resin base material 3 (or the second resin base material 4). It is also possible to adopt a configuration in which it is formed on a bent portion of the base material 4).
  • At least one connection end of the heater wire is configured by a proximity wiring region in which the heater wire is wired in close proximity, and the one connection end of the heater wire
  • An appropriate configuration is included in which the wire harness connection terminal is placed and one connection end of the heater wire and the wire harness connection terminal are fixed by a joint made of a conductive bonding material, for example, the other connection of the heater wire
  • the other connection end and the other wire harness connection terminal are placed on a conductive metal plate, and the other connection end and the other wire harness are connected on the metal plate. It also includes a configuration in which the terminal is fixed at a joint portion of a conductive bonding material and conductively connected.
  • connection ends 51, 52, etc. of the heater wire 5 and the wire harness connection terminals 61, 62 are conductively connected in the region of the tab 21 formed to protrude laterally when viewed from the front of the radome.
  • this configuration in a required area other than the electromagnetic wave transmission area R, even outside the tab 21 area.
  • the present invention can be used for radomes for in-vehicle radar devices.

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

Abstract

In a radome 1 for a vehicle-mounted radar device: a base body 2 is configured by stacking a first resin base material 3 and a second resin base material 4 on one another and affixing the same; a heater wire 5 routed along a groove 31 is embedded between the first resin base material 3 and the second resin base material 4; connecting end portions 51, 52 of the heater wire 5 are configured in a proximate wiring region 53 in which portions of the heater wire 5 are routed so as to be in close proximity to one another; wire harness connection terminals 61, 62 are placed respectively on the connecting end portions 51, 52 and are affixed using bonding portions 71, 72 comprising an electrically conductive bonding material; and the bonding portions 71, 72 are embedded in the base body 2. Bonding between the connecting end portions of the heater wire and the wire harness connection terminals can be performed easily and reliably, and manufacturing costs can be reduced.

Description

車載レーダー装置用レドーム及びその製造方法Radome for in-vehicle radar device and manufacturing method thereof
　本発明は、車載レーダー装置の前側に設けられる車載レーダー装置用レドームに係り、特に融雪機能を有する車載レーダー装置用レドーム及びその製造方法に関する。 The present invention relates to a radome for a vehicle-mounted radar device provided on the front side of the vehicle-mounted radar device, and more particularly to a radome for a vehicle-mounted radar device having a snow-melting function and a manufacturing method thereof.
　従来、融雪機能を有する車載レーダー装置用レドームとして、ミリ波の透過性能低下を抑制するようにヒーター線が配置されるレドームが知られており、このようなレドームとして特許文献１に開示されているレドームがある。 Conventionally, as a radome for an in-vehicle radar device having a snow-melting function, a radome in which a heater wire is arranged so as to suppress a decrease in transmission performance of millimeter waves is known. Such a radome is disclosed in Patent Document 1. There is a radome.
　このレドームは、樹脂製の前基材と樹脂製の後基材とから構成され、前基材の表面に溝が形成され、この溝にヒーター線が嵌めこまれてヒーター線の全体が溝に収納されるように配線されているものである。そして、溝に収納されたヒーター線を覆うようにして前基材の表面に透明フィルムが設けられ、前基材に圧着されており、この透明フィルムでヒーター線を覆うことにより、ヒーター線の耐候性、耐食性、耐傷性が高められている（特許文献１の図６、段落［００４２］、［００４４］～［００４６］参照）。 This radome is composed of a front base material made of resin and a rear base material made of resin. A groove is formed in the surface of the front base material. It is wired so that it can be stored. A transparent film is provided on the surface of the front base material so as to cover the heater wire housed in the groove, and is pressed against the front base material. (see FIG. 6, paragraphs [0042], [0044] to [0046] of Patent Document 1).
特開２０２０－１３９８６０号公報Japanese Patent Application Laid-Open No. 2020-139860
　ところで、車載レーダー装置用レドームの樹脂基材に形成した溝に沿うようにヒーター線を配線し、ヒーター線の耐候性、耐食性、耐傷性を確保する別の構造として、一方の樹脂基材に形成した溝に沿うようにヒーター線を配線し、一方の樹脂基材のヒーター線配線側の面に他方の樹脂基材を積層して固着し、ヒーター線を一方の樹脂基材と他方の樹脂基材との間に埋設する構造が考えられる。 By the way, the heater wire is wired along the grooves formed in the resin base material of the radome for automotive radar equipment, and another structure that secures the weather resistance, corrosion resistance, and scratch resistance of the heater wire is formed on one of the resin base materials. The heater wire is wired along the groove, and the other resin base material is laminated and fixed to the surface of one resin base material on the side of the heater wire wiring, and the heater wire is connected to the one resin base material and the other resin base material. A structure in which it is embedded between the material is conceivable.
　この構造のレドームとする場合、他方の樹脂基材を固着する前に、一方の樹脂基材に配線したヒーター線の接続端部をワイヤーハーネス接続端子と接合して導通接続することが必要となる。そして、このレドームは、ヒーター線の接続端部とワイヤーハーネス接続端子との接合を容易且つ確実に行うことができる構造であることが望ましい。 In the case of a radome of this structure, it is necessary to join the connection end of the heater wire wired to one resin base material to the wire harness connection terminal for conductive connection before fixing the other resin base material. . It is desirable that the radome has a structure capable of easily and reliably joining the connection end portion of the heater wire and the wire harness connection terminal.
　本発明は上記課題に鑑み提案するものであり、一方の樹脂基材のヒーター線配線側の面に他方の樹脂基材が積層されて固着されるレドーム構造において、ヒーター線の接続端部とワイヤーハーネス接続端子との接合を容易且つ確実に行うことができると共に、製造コストを低減することができる車載レーダー装置用レドーム及びその製造方法を提供することを目的とする。 The present invention is proposed in view of the above problems, and in a radome structure in which one resin base material is laminated and fixed to the surface of the other resin base material on the heater wire wiring side, the connection end portion of the heater wire and the wire It is an object of the present invention to provide a radome for an in-vehicle radar device which can be easily and reliably joined to a harness connection terminal and which can reduce manufacturing costs, and a method of manufacturing the same.
　本発明の車載レーダー装置用レドームは、電磁波透過性の基体の面方向に配線されるヒーター線を備え、第１の樹脂基材と第２の樹脂基材を積層配置して固着されることにより前記基体が構成され、前記第１の樹脂基材と前記第２の樹脂基材との間に溝に沿うように配線される前記ヒーター線が埋設され、前記ヒーター線の少なくとも一方の接続端部が、前記ヒーター線が近接するように配線された近接配線領域で構成され、前記ヒーター線の一方の接続端部にワイヤーハーネス接続端子が載置され、前記ヒーター線の一方の接続端部と前記ワイヤーハーネス接続端子とが導電性接合材からなる接合部で固着され、前記接合部が前記基体に埋設されていることを特徴とする。
　これによれば、第２の樹脂基材又は第１の樹脂基材を固着する前に、第１の樹脂基材又は第２の樹脂基材に配線したヒーター線の接続端部とワイヤーハーネス接続端子とを接合して導通接続する際、ヒーター線が近接するように配線されて電気的な接続範囲が広げられた近接配線領域にワイヤーハーネス接続端子を載置して接合することができ、ヒーター線の接続端部とワイヤーハーネス接続端子との接合、電気的接続を容易且つ確実に行うことができる。また、例えばヒーター線の電気的な接続範囲を広げるための金属板等の別部材を用いずに、ヒーター線の接続端部とワイヤーハーネス接続端子とを導通して接合できることから、製造コストを低減することができる。また、配線されるヒーター線、ヒーター線の接続端部、ワイヤーハーネス接続端子が第１の樹脂基材と第２の樹脂基材で構成される基体の内部に封止されることになるから、配線されたヒーター線や、ヒーター線の接続部分の防水性、耐候性、耐食性、耐傷性を確保することができる。 A radome for an in-vehicle radar device of the present invention includes a heater wire wired in the surface direction of an electromagnetic wave transparent substrate, and is formed by stacking and fixing a first resin base material and a second resin base material. The substrate is configured, the heater wire wired along the groove is embedded between the first resin base material and the second resin base material, and at least one connection end portion of the heater wire is composed of a proximity wiring region in which the heater wire is wired in close proximity, a wire harness connection terminal is placed on one connection end of the heater wire, and one connection end of the heater wire and the The wire harness connection terminal is fixed by a joint made of a conductive joint material, and the joint is embedded in the base.
According to this, before fixing the second resin base material or the first resin base material, the connection end of the heater wire wired to the first resin base material or the second resin base material and the wire harness connection The wire harness connection terminal can be placed and joined to the adjacent wiring area where the heater wire is wired close to the heater wire and the electrical connection range is widened when joining the terminal and conducting connection. The connection end of the wire and the wire harness connection terminal can be joined and electrically connected easily and reliably. In addition, for example, without using a separate member such as a metal plate for expanding the electrical connection range of the heater wire, the connection end of the heater wire and the wire harness connection terminal can be electrically connected and joined, reducing manufacturing costs. can do. In addition, since the heater wires to be wired, the connection ends of the heater wires, and the wire harness connection terminals are sealed inside the base body composed of the first resin base material and the second resin base material, It is possible to secure waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire and the connecting portion of the heater wire.
　本発明の車載レーダー装置用レドームは、前記ヒーター線の一方の接続端部と他方の接続端部のそれぞれが、前記ヒーター線が近接するように配線された近接配線領域で構成され、前記ヒーター線の一方の接続端部に一のワイヤーハーネス接続端子が載置され、前記ヒーター線の他方の接続端部に他のワイヤーハーネス接続端子が載置され、前記ヒーター線の一方の接続端部と前記一のワイヤーハーネス接続端子とが導電性接合材からなる第１の接合部で固着され、前記ヒーター線の他方の接続端部と前記他のワイヤーハーネス接続端子とが導電性接合材からなる第２の接合部で固着され、前記第１の接合部と前記第２の接合部とが前記基体に埋設されていることを特徴とする。
　これによれば、ヒーター線の一方の接続端部と一のワイヤーハーネス接続端子との接合と、ヒーター線の他方の接続端部と他のワイヤーハーネス接続端子との接合の双方を容易且つ確実に行うことができる。また、ヒーター線の両方の接続端部とワイヤーハーネス接続端子とを導通して接合できることから、製造コストをより低減することができる。また、配線されたヒーター線や、両方のヒーター線の接続部分の防水性、耐候性、耐食性、耐傷性を確保することができる。 In the radome for an in-vehicle radar device of the present invention, each of one connection end portion and the other connection end portion of the heater wire is constituted by a close wiring region in which the heater wire is wired in close proximity, and the heater wire One wire harness connection terminal is placed on one connection end of the heater wire, another wire harness connection terminal is placed on the other connection end of the heater wire, and one connection end of the heater wire and the One wire harness connection terminal is fixed by a first joint made of a conductive joint material, and the other connection end of the heater wire and the other wire harness connection terminal are made of a conductive joint material. and the first joint and the second joint are embedded in the base.
According to this, both the joining of one connection end portion of the heater wire and the one wire harness connection terminal and the joining of the other connection end portion of the heater wire and the other wire harness connection terminal can be easily and reliably performed. It can be carried out. Moreover, since both connection end portions of the heater wire and the wire harness connection terminal can be electrically connected and joined, the manufacturing cost can be further reduced. In addition, it is possible to ensure the waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire and the connecting portion of both heater wires.
　本発明の車載レーダー装置用レドームは、前記近接配線領域が、前記ヒーター線を蛇行状に近接配線して形成されている、若しくは前記ヒーター線を渦巻状に近接配線して形成されていることを特徴とする。
　これによれば、ヒーター線が近接するように配線された近接配線領域で構成される近接配線領域の電気的な接続範囲をより確実に広げることができ、ヒーター線の接続端部とワイヤーハーネス接続端子との接合、電気的接続をより確実に行うことができる。 In the radome for an in-vehicle radar device of the present invention, the adjacent wiring region is formed by wiring the heater wire in a meandering manner, or by wiring the heater wire in a spiral manner. Characterized by
According to this, it is possible to more reliably widen the electrical connection range of the adjacent wiring region configured by the adjacent wiring region in which the heater wires are wired so as to be close to each other, and the connection end portion of the heater wire and the wire harness can be connected. Joining with terminals and electrical connection can be performed more reliably.
　本発明の車載レーダー装置用レドームは、前記接合部を覆うように被覆樹脂が形成され、前記被覆樹脂が前記基体に埋設されていることを特徴とする。
　これによれば、ヒーター線が配線された第１の樹脂基材又は第２の樹脂基材に対して、第２の樹脂基材又は第１の樹脂基材を例えば射出成形して形成する際に、被覆樹脂で接合箇所を保護することができ、射出成形時の樹脂圧で接合箇所に剥離や断線が生ずることを防止することができる。 A radome for a vehicle-mounted radar device according to the present invention is characterized in that a coating resin is formed so as to cover the joint portion, and the coating resin is embedded in the base.
According to this, when the second resin base material or the first resin base material is formed by, for example, injection molding with respect to the first resin base material or the second resin base material to which the heater wires are wired, In addition, it is possible to protect the joints with the coating resin, thereby preventing peeling or disconnection from occurring at the joints due to resin pressure during injection molding.
　本発明の車載レーダー装置用レドームの製造方法は、本発明の車載レーダー装置用レドームを製造する方法であって、前記第１の樹脂基材の前記第２の樹脂基材が積層される側の面に所定パターンで溝を形成して、前記近接配線領域に対応する箇所に近接する溝を形成する第１工程と、前記溝に沿うようにヒーター線を配線して、前記ヒーター線が近接するように配線された近接配線領域で構成される前記ヒーター線の一方の接続端部と他方の接続端部とを形成する第２工程と、前記ヒーター線の一方の接続端部に一のワイヤーハーネス接続端子を載置して、前記一方の接続端部と前記一のワイヤーハーネス接続端子とを導電性接合材で固着して第１の接合部を形成すると共に、前記ヒーター線の他方の接続端部に他のワイヤーハーネス接続端子を載置して、前記他方の接続端部と前記他のワイヤーハーネス接続端子とを導電性接合材で固着して第２の接合部を形成する第３工程と、前記第２の樹脂基材を射出成形で形成して前記第１の樹脂基材に固着すると共に、前記第１の樹脂基材と前記第２の樹脂基材との間に、前記ヒーター線、前記一のワイヤーハーネス接続端子、前記第１の接合部、前記他のワイヤーハーネス接続端子、前記第２の接合部を埋設する第４工程を備えることを特徴とする。
　これによれば、第１の樹脂基材の面に、近接配線領域に対応する箇所に近接する溝を有する所定パターンの溝を形成し、この溝に沿ってヒーター線を配線することにより、容易に近接配線領域で構成されるヒーター線の一方の接続端部と他方の接続端部とを形成することができる。 A method for manufacturing a radome for a vehicle-mounted radar device according to the present invention is a method for manufacturing a radome for a vehicle-mounted radar device according to the present invention, wherein A first step of forming grooves in a predetermined pattern on a surface to form grooves adjacent to locations corresponding to the adjacent wiring regions, and wiring heater wires along the grooves so that the heater wires are adjacent to each other. A second step of forming one connection end portion and the other connection end portion of the heater wire configured in the adjacent wiring region wired in the manner as described above, and a wire harness at one connection end portion of the heater wire A connection terminal is placed, and the one connection end portion and the one wire harness connection terminal are fixed with a conductive bonding material to form a first joint portion, and the other connection end of the heater wire is formed. a third step of placing another wire harness connection terminal on the portion and bonding the other connection end portion and the other wire harness connection terminal with a conductive bonding material to form a second joint portion; , the second resin base material is formed by injection molding and fixed to the first resin base material, and the heater wire is provided between the first resin base material and the second resin base material and a fourth step of embedding the one wire harness connection terminal, the first joint portion, the other wire harness connection terminal, and the second joint portion.
According to this, grooves of a predetermined pattern having grooves close to locations corresponding to the adjacent wiring regions are formed on the surface of the first resin base material, and the heater wires are wired along the grooves, thereby making it easy to perform wiring. It is possible to form one connection end and the other connection end of the heater wire configured in the adjacent wiring region.
　本発明の車載レーダー装置用レドームの製造方法は、前記第３工程において、加熱されて溶融状態の導電性接合材で前記ヒーター線の一方の接続端部の絶縁被覆と他方の接続端部の絶縁被覆を除去し、温度が低下した導電性接合材により、前記一方の接続端部と前記一のワイヤーハーネス接続端子とを固着し、前記他方の接続端部と前記他のワイヤーハーネス接続端子とを固着することを特徴とする。
　これによれば、絶縁被覆されたヒーター線を用いて配線する場合にも、溶融状態の導電性接合材でヒーター線の接続端部の絶縁被覆を除去することができ、ヒーター線の配線前に予め絶縁被覆を除去せずとも、ヒーター線の接続端部とワイヤーハーネス接続端子の接合、電気的接続を行うことができる。従って、車載レーダー装置用レドームの製造工程を効率化することができる。 In the method of manufacturing a radome for a vehicle-mounted radar device according to the present invention, in the third step, the insulating coating of one connection end of the heater wire and the insulation of the other connection end of the heater wire with a conductive bonding material in a molten state due to heating. The one connection end and the one wire harness connection terminal are fixed with a conductive bonding material whose temperature has been removed after the coating is removed, and the other connection end and the other wire harness connection terminal are fixed. It is characterized by sticking.
According to this, even when wiring is performed using a heater wire coated with an insulation, the insulation coating of the connection end portion of the heater wire can be removed with the conductive bonding material in a molten state. The connection end of the heater wire and the wire harness connection terminal can be joined and electrically connected without removing the insulating coating in advance. Therefore, it is possible to streamline the manufacturing process of the radome for a vehicle-mounted radar device.
　本発明によれば、一方の樹脂基材のヒーター線配線側の面に他方の樹脂基材が積層されて固着される車載レーダー装置用レドームにおいて、ヒーター線の接続端部とワイヤーハーネス接続端子との接合を容易且つ確実に行うことができると共に、製造コストを低減することができる。 According to the present invention, in a radome for an in-vehicle radar device in which the other resin base material is laminated and fixed to the surface of one resin base material on the heater wire wiring side, the connection end portion of the heater wire and the wire harness connection terminal can be easily and reliably joined, and the manufacturing cost can be reduced.
本発明による実施形態の車載レーダー装置用レドームの正面図。BRIEF DESCRIPTION OF THE DRAWINGS The front view of the radome for vehicle-mounted radar apparatus of embodiment by this invention. 図１の部分拡大正面図。FIG. 2 is a partially enlarged front view of FIG. 1; 図２の近接配線領域の周辺の拡大図。FIG. 3 is an enlarged view of the periphery of the adjacent wiring area in FIG. 2; 実施形態の車載レーダー装置用レドームにおける第１の樹脂基材とヒーター線の近接配線領域の周辺を示す部分拡大正面図。FIG. 4 is a partially enlarged front view showing the periphery of the adjacent wiring region between the first resin base material and the heater wire in the radome for the vehicle-mounted radar device of the embodiment. 実施形態の車載レーダー装置用レドームの縦断面図。1 is a longitudinal sectional view of a radome for a vehicle-mounted radar device according to an embodiment; FIG. （ａ）～（ｄ）は実施形態の車載レーダー装置用レドームにおけるヒーター線の接続端部とワイヤーハーネス接続端子を接合する工程を説明する工程説明図。4(a) to 4(d) are process explanatory diagrams for explaining the process of joining the connection end portion of the heater wire and the wire harness connection terminal in the radome for the in-vehicle radar device according to the embodiment. 実施形態の車載レーダー装置用レドームにおける第１の樹脂基材、ヒーター線、ワイヤーハーネス接続端子、接合部を金型の内部に配置した状態を示す説明図。FIG. 4 is an explanatory view showing a state in which the first resin base material, the heater wire, the wire harness connection terminals, and the joint portion in the radome for the vehicle-mounted radar device of the embodiment are arranged inside the mold. （ａ）～（ｃ）は絶縁被覆されたヒーター線を用いる変形例のヒーター線の接続端部とワイヤーハーネス接続端子を接合する工程を説明する工程説明図。(a) to (c) are process explanatory diagrams for explaining a process of joining a connection end portion of a heater wire and a wire harness connection terminal of a modified example using a heater wire coated with insulation. （ａ）、（ｂ）はヒーター線の接続端部とワイヤーハーネス接続端子を接合する接合部を絶縁被覆する変形例の製造工程を説明する工程説明図。(a), (b) is process explanatory drawing explaining the manufacturing process of the modification which carries out insulation coating of the junction part which joins the connection end part of a heater wire, and a wire harness connection terminal. 変形例の近接配線領域を有する車載レーダー装置用レドームの部分拡大正面図。FIG. 11 is a partially enlarged front view of a radome for an in-vehicle radar device having a close wiring area according to a modification;
　〔実施形態の車載レーダー装置用レドーム〕
　本発明による実施形態の車載レーダー装置用レドーム１は、例えば車両のバンパーに取り付けられるバンパーカバー等として用いられるものであり、図１～図５に示すように、電磁波透過性の基体２を備える。基体２は、例えば視認側と逆側に配置される第１の樹脂基材３と、第１の樹脂基材３の前側である視認側に配置される第２の樹脂基材４とから構成され、第１の樹脂基材３と第２の樹脂基材４は積層配置して固着されている。尚、必要に応じて、第２の樹脂基材４を視認側と逆側に配置し、第１の樹脂基材３を視認側に配置する構成としてもよい。第１の樹脂基材３と第２の樹脂基材４はそれぞれ絶縁性で電磁波透過性の合成樹脂で形成されている。 [Radiome for in-vehicle radar device of embodiment]
A radome 1 for a vehicle-mounted radar device according to an embodiment of the present invention is used, for example, as a bumper cover attached to a bumper of a vehicle. The substrate 2 is composed of, for example, a first resin base material 3 arranged on the side opposite to the viewing side, and a second resin base material 4 arranged on the viewing side, which is the front side of the first resin base material 3 . The first resin base material 3 and the second resin base material 4 are laminated and fixed. In addition, it is good also as a structure which arrange|positions the 2nd resin base material 4 on the opposite side to the visual recognition side as needed, and arrange|positions the 1st resin base material 3 on the visual recognition side. The first resin base material 3 and the second resin base material 4 are each made of an insulating and electromagnetic wave transmitting synthetic resin.
　第１の樹脂基材３と、第２の樹脂基材４には、異種の合成樹脂又は同種の合成樹脂を用いることができ、複素誘電率に基づき定義される屈折率ｎが相互に整合する、又は、屈折率ｎが略同一或いは近接する材料で第１の樹脂基材３と第２の樹脂基材４を形成すると、電磁波の透過性能向上の観点から好適である。第１の樹脂基材３と第２の樹脂基材４の近接する屈折率の数値範囲としては、第１の樹脂基材３と第２の樹脂基材４の屈折率の相違が０～１０％の範囲内とすると良好である。 Different kinds of synthetic resins or the same kind of synthetic resin can be used for the first resin base material 3 and the second resin base material 4, and the refractive indices n defined based on the complex dielectric constant match each other. Alternatively, forming the first resin base material 3 and the second resin base material 4 with materials having substantially the same or close refractive index n is preferable from the viewpoint of improving the transmission performance of electromagnetic waves. As the numerical range of the refractive indices of the first resin base material 3 and the second resin base material 4 close to each other, the difference in refractive index between the first resin base material 3 and the second resin base material 4 is 0 to 10. % range is good.
　ここでの屈折率ｎは比誘電率実数部εr'と比誘電率虚数部εr"から数式１として定義される量である。 透過性の観点から適用周波数における虚数部と実数部の比から数式２として定義される誘電正接（ロスタンジェント）tanδの大きさは０．１以下とすると好適である。また比誘電率実部の大きさは３以下とすると好適である。誘電正接と非誘電率実部の大きさをこれらの数値以下とすることにより、レドームに必要とされる反射率と内部損失の低減を確実にすることが可能となる。 Here, the refractive index n is a quantity defined by Equation 1 from the real part of relative permittivity εr′ and the imaginary part of relative permittivity εr″. It is preferable that the magnitude of the dielectric loss tangent (loss tangent) tan δ defined as 2 is 0.1 or less, and the magnitude of the real part of the relative permittivity is preferably 3 or less. By setting the real part size to these values or less, it is possible to ensure the reflectivity and internal loss reduction required for the radome.
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000002
Figure JPOXMLDOC01-appb-M000002
　第１の樹脂基材３の合成樹脂と、第２の樹脂基材４の合成樹脂には、本発明の趣旨の範囲内で適宜の合成樹脂を用いることが可能であり、例えばポリメチルメタクリレート（ＰＭＭＡ）等のアクリル系樹脂、ポリカーボネート（ＰＣ）、アクリロニトリル－ブタジエン－スチレン共重合体（ＡＢＳ）、アクリロニトリル－スチレン－アクリレート共重合（ＡＳＡ）、アクリロニトリル－エチレンプロピルラバー－スチレン共重合体（ＡＥＳ）、ポリプロピレン（ＰＰ）等の１種を単独でまたは２種以上を組み合わせて用いると良好であり、又、添加剤を含有させてもよい。又、これらの合成樹脂には発泡体を用いても良い。また、第１の樹脂基材３と第２の樹脂基材４の電磁波透過方向における厚さに関し、第１の樹脂基材３の厚さと第２の樹脂基材４の厚さの比や、第１の基材樹脂３の厚さや、第２の樹脂基材４の厚さや、第１の樹脂基材３と第２の樹脂基材４で構成される基体２の総厚は、車載レーダー装置用レドーム１として所要の電磁波透過性を確保できる範囲で適宜である。 For the synthetic resin of the first resin substrate 3 and the synthetic resin of the second resin substrate 4, it is possible to use an appropriate synthetic resin within the scope of the present invention. PMMA) and other acrylic resins, polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (ASA), acrylonitrile-ethylene propyl rubber-styrene copolymer (AES), It is preferable to use one type such as polypropylene (PP) alone or in combination of two or more types, and additives may be contained. Moreover, a foam may be used for these synthetic resins. Regarding the thicknesses of the first resin base material 3 and the second resin base material 4 in the electromagnetic wave transmission direction, the ratio of the thickness of the first resin base material 3 to the thickness of the second resin base material 4, The thickness of the first resin base material 3, the thickness of the second resin base material 4, and the total thickness of the base body 2 composed of the first resin base material 3 and the second resin base material 4 are determined by the in-vehicle radar. Any material may be used as long as the device radome 1 can ensure the required electromagnetic wave permeability.
　車載レーダー装置用レドーム１には、ヒーター線５が電磁波透過性の基体２の面方向に配線されている。ヒーター線３を構成する導電性材料には、本発明の趣旨の範囲内で適宜の導電性材料を用いることが可能であり、例えば銅、銀、銀メッキ銅、銅銀合金、銅ニッケル合金、ニッケルクロム合金、鉄クロム合金、ＩＴＯ膜のような透明導電膜、又はカーボン繊維等とすると良好である。又、ヒーター線の形態は問わず、線材、導電インク、導電フィラー等を利用することができる。 A heater wire 5 is wired in the plane direction of the electromagnetic wave transparent substrate 2 in the radome 1 for an in-vehicle radar device. As the conductive material constituting the heater wire 3, it is possible to use an appropriate conductive material within the scope of the present invention, such as copper, silver, silver-plated copper, copper-silver alloy, copper-nickel alloy, A nickel-chromium alloy, an iron-chromium alloy, a transparent conductive film such as an ITO film, carbon fiber, or the like is preferable. In addition, regardless of the form of the heater wire, a wire material, conductive ink, conductive filler, or the like can be used.
　図示例のヒーター線５は、板状の基体２の主要部において基体２が拡がる方向に沿って蛇行し、折り返すように配線されて一連で延びて形成されており、基体２の車載レーダー装置による電磁波照射領域Ｒとその外側においてヒーター線５の直線部が基体２の面方向に沿って間隔を開けて並設されていると共に、隣り合うヒーター線５の直線部に流れる電流の方向が互いに略反平行或いは反平行となるように設定されている。 The heater wire 5 of the illustrated example is formed by winding along the direction in which the substrate 2 expands in the main part of the plate-shaped substrate 2, and is wired so as to turn back and extend in a series. In the electromagnetic wave irradiation region R and the outside thereof, the straight portions of the heater wires 5 are arranged in parallel along the surface direction of the substrate 2 with an interval therebetween, and the directions of the currents flowing in the straight portions of the adjacent heater wires 5 are substantially mutually. It is set to be anti-parallel or anti-parallel.
　また、ヒーター線５は、第１の樹脂基材３と第２の樹脂基材４との間に埋設されており、第１の樹脂基材３と第２の樹脂基材４とで挟持されるようにして、第１の樹脂基材３と第２の樹脂基材４とで構成される基体２に埋設されて封止されている。本実施形態では、第１の樹脂基材３の第２の樹脂基材４との固着面側に溝３１が形成され、第２の樹脂基材４の第１の樹脂基材３との固着面側に溝３１と対向するように別の溝４１が形成されており、ヒーター線５は、第１の樹脂基材３の溝３１と第２の樹脂基材４の別の溝４１とに嵌められて溝３１及び溝４１に沿って配線されている（図５参照）。尚、ヒーター線５は、第１の樹脂基材３の溝３１又は第２の樹脂基材４の溝４１だけに沿うように配線し、第２の樹脂基材４又は第１の樹脂基材３にはヒーター線を配線する溝を形成しない構成としてもよい。 The heater wire 5 is embedded between the first resin base material 3 and the second resin base material 4 and sandwiched between the first resin base material 3 and the second resin base material 4. In this way, it is embedded and sealed in the base body 2 composed of the first resin base material 3 and the second resin base material 4 . In the present embodiment, a groove 31 is formed on the surface of the first resin base material 3 to be fixed to the second resin base material 4 , so that the second resin base material 4 is fixed to the first resin base material 3 . Another groove 41 is formed on the face side so as to face the groove 31 , and the heater wire 5 is inserted into the groove 31 of the first resin base material 3 and the another groove 41 of the second resin base material 4 . It is fitted and wired along the grooves 31 and 41 (see FIG. 5). In addition, the heater wire 5 is wired along only the groove 31 of the first resin base material 3 or the groove 41 of the second resin base material 4, and the second resin base material 4 or the first resin base material is connected. 3 may have a configuration in which a groove for wiring the heater wire is not formed.
　そして、基体２の電磁波透過領域Ｒ以外の領域、本実施形態では側方に突出形成されているタブ２１の領域には、ヒーター線５の両方の端部が延設されて、ヒーター線５の一方の接続端部５１と他方の接続端部５２が設けられている。ヒーター線５の一方の接続端部５１と他方の接続端部５２のそれぞれは、ヒーター線５が近接するように配線された近接配線領域５３で構成されており、本実施形態における近接配線領域５３は、ヒーター線５を蛇行状に近接配線して形成されている。尚、近接配線領域５３におけるヒーター線５も、第１の樹脂基材３の溝３１と第２の樹脂基材４の別の溝４１とに嵌められて溝３１及び溝４１に沿って配線されている。 Both ends of the heater wire 5 are extended in a region other than the electromagnetic wave transmission region R of the substrate 2, which is the region of the tab 21 formed to protrude sideways in this embodiment. One connection end 51 and the other connection end 52 are provided. Each of one connection end portion 51 and the other connection end portion 52 of the heater wire 5 is constituted by a proximity wiring region 53 in which the heater wire 5 is wired in proximity. are formed by closely wiring the heater wires 5 in a meandering manner. The heater wire 5 in the adjacent wiring region 53 is also fitted in the groove 31 of the first resin base material 3 and another groove 41 of the second resin base material 4 and wired along the grooves 31 and 41. ing.
　ヒーター線５の一方の接続端部５１には一のワイヤーハーネス接続端子６１が載置され、ヒーター線５の導電性の一方の接続端部５１と一のワイヤーハーネス接続端子６１が接触するように配置されている。そして、ヒーター線５の一方の接続端部５１と一のワイヤーハーネス接続端子６１とが導電性接合材からなる第１の接合部７１で固着されて、ヒーター線５の一方の接続端部５１と一のワイヤーハーネス接続端子６１と第１の接合部７１とが一定化するように接合され、ヒーター線５の導電性の一方の接続端部５１と一のワイヤーハーネス接続端子６１が導通接続されている。第１の接合部７１を構成する導電性接合材には、はんだ、ろう材、導電性接着剤（ＥＣＡ）、又は異方性導電ペースト（ＡＣＰ）等を用いると好適である。 One wire harness connection terminal 61 is mounted on one connection end portion 51 of the heater wire 5, and the conductive one connection end portion 51 of the heater wire 5 and the one wire harness connection terminal 61 are in contact with each other. are placed. Then, one connection end portion 51 of the heater wire 5 and one wire harness connection terminal 61 are fixed by a first joint portion 71 made of a conductive bonding material, and the one connection end portion 51 of the heater wire 5 and The one wire harness connection terminal 61 and the first joint portion 71 are joined so as to be uniform, and the one conductive connection end portion 51 of the heater wire 5 and the one wire harness connection terminal 61 are electrically connected. there is Solder, brazing material, conductive adhesive (ECA), anisotropic conductive paste (ACP), or the like is preferably used as the conductive bonding material forming the first bonding portion 71 .
　ヒーター線５の他方の接続端部５２には他のワイヤーハーネス接続端子６２が載置され、ヒーター線５の導電性の他方の接続端部５２と他のワイヤーハーネス接続端子６２が接触するように配置されている。そして、ヒーター線５の他方の接続端部５２と他のワイヤーハーネス接続端子６２とが導電性接合材からなる第２の接合部７２で固着されて、ヒーター線５の他方の接続端部５２と他のワイヤーハーネス接続端子６２と第２の接合部７２とが一定化するように接合され、ヒーター線５の導電性の他方の接続端部５２と他のワイヤーハーネス接続端子６２が導通接続されている。第２の接合部７２を構成する導電性接合材にも、はんだ、ろう材、導電性接着剤（ＥＣＡ）、又は異方性導電ペースト（ＡＣＰ）等を用いると好適である。 Another wire harness connection terminal 62 is placed on the other connection end portion 52 of the heater wire 5, and the other conductive connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are in contact with each other. are placed. Then, the other connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are fixed by a second joint portion 72 made of a conductive bonding material, and the other connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are fixed. The other wire harness connection terminal 62 and the second joint portion 72 are joined so as to be uniform, and the other conductive connection end portion 52 of the heater wire 5 and the other wire harness connection terminal 62 are electrically connected. there is It is preferable to use solder, brazing material, conductive adhesive (ECA), anisotropic conductive paste (ACP), or the like for the conductive bonding material forming the second bonding portion 72 as well.
　製品の安定した品質確保と、ヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２の安定した導通接続の確保の観点からは、ヒーター線５の一方の接続端部５１や他方の接続端部５２を構成する近接配線領域５３において、近接配線されるヒーター線５の線幅を好ましくは０．０３ｍｍ～３ｍｍ、より好ましくは０．０３ｍｍ～０．５ｍｍとすると良く、又、近接配線されるヒーター線５の相互間の間隔を好ましくは０ｍｍ～５ｍｍ、若しくは近接配線されるヒーター線５の相互間の間隔を好ましくはヒーター線５の半径以下とすると良く、又、近接配線されるヒーター線５の面占有率を好ましくは100％～10％、より好ましくは100％～66％とすると良い。 From the viewpoint of ensuring stable product quality and ensuring stable conductive connection between the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62, one connection end 51 of the heater wire 5 and the other In the adjacent wiring region 53 constituting the connection end portion 52 of the adjacent heater wire 5, the line width of the adjacently wired heater wire 5 is preferably 0.03 mm to 3 mm, more preferably 0.03 mm to 0.5 mm. The space between the heater wires 5 that are wired is preferably 0 mm to 5 mm, or the space between the heater wires 5 that are closely wired is preferably less than the radius of the heater wires 5, and the heater wires 5 are closely wired. The area coverage of the heater wire 5 is preferably 100% to 10%, more preferably 100% to 66%.
　更に、近接配線されるヒーター線５の面占有率を前述のように設定する等で配線密度を高めることにより、ヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２の導通接続の安定性を高めることができると同時に、加熱された導電性接合材で接合部７１、７２を形成する際にヒーター線５が溝３１に既に配線されている第１の樹脂基材３（又は第２の樹脂基材４）が熱で損傷することを抑制することができる。 Furthermore, by increasing the wiring density by setting the surface area ratio of the heater wires 5 that are closely wired as described above, the connection ends 51 and 52 of the heater wires 5 and the wire harness connection terminals 61 and 62 can be electrically connected. At the same time, the first resin base material 3 (or It is possible to prevent the second resin base material 4) from being damaged by heat.
　ヒーター線５の一方の接続端部５１と一のワイヤーハーネス接続端子６１とこれらを固着して導通接続している第１の接合部７１、及びヒーター線５の他方の接続端部５２と他のワイヤーハーネス接続端子６２とこれらを固着して導通接続している第２の接合部７２は、第１の樹脂基材３と第２の樹脂基材４とで挟持されるようにして、第１の樹脂基材３と第２の樹脂基材４とで構成される基体２に埋設されて封止され、本実施形態の車載レーダー装置用レドーム１が構成されている。 One connection end portion 51 of the heater wire 5, one wire harness connection terminal 61, a first joint portion 71 that is electrically connected by fixing them, and the other connection end portion 52 of the heater wire 5 and the other The wire harness connection terminals 62 and the second joints 72 that are electrically connected by affixing them are sandwiched between the first resin base material 3 and the second resin base material 4 so as to form the first joint part 72 . The radome 1 for a vehicle-mounted radar device of the present embodiment is constructed by embedding and sealing in a base 2 composed of a resin base material 3 and a second resin base material 4 .
　本実施形態の車載レーダー装置用レドーム１を製造する際には、第１の樹脂基材３の第２の樹脂基材４が積層される側の面に所定パターンで溝３１を形成して、近接配線領域５３に対応する箇所には近接する溝３１を形成する（図６（ａ）参照）。溝３１の形成は、例えば第１の樹脂基材３を射出形成で形成する際に、金型内における溝３１と対応する形状の凸部や突条によって第１の樹脂基材３の形成と同時に形成すると好適であり、又、射出成形等で既に形成されている第１の樹脂基材３の片面に切削加工等で形成しても好適である。 When manufacturing the radome 1 for an in-vehicle radar device of the present embodiment, grooves 31 are formed in a predetermined pattern on the surface of the first resin base material 3 on which the second resin base material 4 is laminated. Proximity grooves 31 are formed at locations corresponding to proximate wiring regions 53 (see FIG. 6A). The grooves 31 are formed by forming the first resin base material 3 by, for example, forming the first resin base material 3 by means of projections or ridges having shapes corresponding to the grooves 31 in the mold when forming the first resin base material 3 by injection molding. It is preferable to form them at the same time, or it is preferable to form them by cutting or the like on one side of the first resin base material 3 already formed by injection molding or the like.
　そして、第１の樹脂基材３に形成された溝３１に沿うように所定パターンでヒーター線５を配線して、近接配線領域５３に対応する箇所ではヒーター線５を溝３１に沿って近接配線し、ヒーター線５が近接するように配線された近接配線領域５３で構成されるヒーター線５の一方の接続端部５１と他方の接続端部５２を形成する（図６（ｂ）参照）。本実施形態におけるヒーター線５は、溝３１の外側に一部が突出するようにして溝３１に嵌め、例えば溶着或いは接着で第１の樹脂基材３に固着して配線する。 Then, the heater wires 5 are wired in a predetermined pattern along the grooves 31 formed in the first resin base material 3 , and the heater wires 5 are proximately wired along the grooves 31 at locations corresponding to the proximity wiring regions 53 . Then, one connection end portion 51 and the other connection end portion 52 of the heater wire 5, which is constituted by the adjacent wiring region 53 in which the heater wire 5 is wired close to each other, are formed (see FIG. 6(b)). The heater wire 5 in this embodiment is fitted in the groove 31 so that a part of it protrudes outside the groove 31, and is fixed to the first resin base material 3 by welding or adhesion, for example, for wiring.
　更に、ヒーター線５の一方の接続端部５１に一のワイヤーハーネス接続端子６１を載置して、一方の接続端部５１と一のワイヤーハーネス接続端子６１とを導電性接合材で固着して第１の接合部７１を形成し、一方の接続端部５１と一のワイヤーハーネス接続端子６１とを導通接続すると共に、ヒーター線５の他方の接続端部５２に他のワイヤーハーネス接続端子６２を載置して、他方の接続端部５２と他のワイヤーハーネス接続端子６２とを導電性接合材で固着して第２の接合部７２を形成し、他方の接続端部５２と他のワイヤーハーネス接続端子６２とを導通接続する（図６（ｃ）、（ｄ）参照）。 Furthermore, one wire harness connection terminal 61 is placed on one connection end portion 51 of the heater wire 5, and the one connection end portion 51 and the one wire harness connection terminal 61 are fixed with a conductive bonding material. A first joint portion 71 is formed, one connection end portion 51 and one wire harness connection terminal 61 are electrically connected, and the other wire harness connection terminal 62 is connected to the other connection end portion 52 of the heater wire 5. Then, the other connection end portion 52 and the other wire harness connection terminal 62 are fixed with a conductive bonding material to form a second joint portion 72, and the other connection end portion 52 and the other wire harness are fixed. It is electrically connected to the connection terminal 62 (see FIGS. 6(c) and 6(d)).
　その後、図７に示すように、ヒーター線５、ワイヤーハーネス接続端子６１、６２、接合部７１、７２が取り付けられた第１の樹脂基材３を割型で構成される金型１００の内部に配置する。この際、ワイヤーハーネス接続端子６１、６２が引き出されるワイヤーハーネス接続部６は、金型１００の一部に形成された導出口１０２から金型１００の外部に導出される。 After that, as shown in FIG. 7, the first resin base material 3 to which the heater wire 5, the wire harness connection terminals 61 and 62, and the joint portions 71 and 72 are attached is placed inside the mold 100 composed of a split mold. Deploy. At this time, the wire harness connection portion 6 from which the wire harness connection terminals 61 and 62 are drawn out is led out of the mold 100 through an outlet 102 formed in a part of the mold 100 .
　そして、金型１００の注入口１０１から金型１００の内部に溶融樹脂ＭＲを流し込んで射出成形を行い、第１の樹脂基材３の接合部７１、７２が形成されている面側に射出成形して第２の樹脂基材４を形成し、第２の樹脂基材４を第１の樹脂基材３に固着する。第２の樹脂基材４は射出成形によって積層される界面が第１の樹脂基材３、ヒーター線５、一方の接続端部５１、一のワイヤーハーネス接続端子６１、第１の接合部７１、他方の接続端部５２、他のワイヤーハーネス接続端子６２、第２の接合部７２に成形溶着され、第１の樹脂基材３と第２の樹脂基材４との間に、ヒーター線５、一方の接続端部５１、一のワイヤーハーネス接続端子６１、第１の接合部７１、他方の接続端部５２、他のワイヤーハーネス接続端子６２、第２の接合部７２が埋設される。 Then, injection molding is performed by pouring molten resin MR into the mold 100 from the inlet 101 of the mold 100, and injection molding is performed on the side of the first resin base material 3 on which the joint portions 71 and 72 are formed. Then, the second resin base material 4 is formed, and the second resin base material 4 is fixed to the first resin base material 3 . The interface of the second resin base material 4 laminated by injection molding includes the first resin base material 3, the heater wire 5, one connection end portion 51, one wire harness connection terminal 61, the first joint portion 71, The other connection end portion 52, the other wire harness connection terminal 62, and the second joint portion 72 are molded and welded, and between the first resin base material 3 and the second resin base material 4, the heater wire 5, One connection end portion 51, one wire harness connection terminal 61, a first joint portion 71, the other connection end portion 52, another wire harness connection terminal 62, and a second joint portion 72 are embedded.
　また、第２の樹脂基材４は、ヒーター線５の溝３１の外側に突出する部分を覆うように形成されることから、ヒーター線５の溝３１の外側に突出する部分が第２の樹脂基材４にインサート成形されるようにして成形固着され、第２の樹脂基材４の別の溝４１にヒーター線５が嵌まった状態となる。尚、第２の樹脂基材４は、射出成形で形成される構成に限定されず、必要に応じて第１の樹脂基材３に接着等で固着しても良好である。第２の樹脂基材４の形成後には、金型１００を脱型して本実施形態の車載レーダー装置用レドーム１が得られる。 Further, since the second resin base material 4 is formed so as to cover the portion of the heater wire 5 protruding outside the groove 31, the portion of the heater wire 5 protruding outside the groove 31 is covered with the second resin base material 4. The heater wire 5 is molded and fixed to the base material 4 by insert molding, and the heater wire 5 is fitted in another groove 41 of the second resin base material 4 . The second resin base material 4 is not limited to the configuration formed by injection molding, and may be fixed to the first resin base material 3 by adhesion or the like as necessary. After the second resin base material 4 is formed, the mold 100 is demolded to obtain the radome 1 for a vehicle-mounted radar device of the present embodiment.
　本実施形態によれば、第２の樹脂基材４（又は第１の樹脂基材３）を固着する前に、第１の樹脂基材３（又は第２の樹脂基材４）に配線したヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２とを接合して導通接続する際、ヒーター線５が近接するように配線されて電気的な接続範囲が広げられた近接配線領域５３にワイヤーハーネス接続端子６１、６２を載置して接合することができ、ヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２との接合、電気的接続を容易且つ確実に行うことができる。 According to this embodiment, before the second resin base material 4 (or the first resin base material 3) is fixed, the first resin base material 3 (or the second resin base material 4) is wired. When the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 are joined and electrically connected, the heater wire 5 is wired so as to be close to each other to widen the electrical connection range. The wire harness connection terminals 61 and 62 can be placed and joined to the region 53, and the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 can be joined and electrically connected easily and reliably. can be done.
　また、例えばヒーター線５の電気的な接続範囲を広げるための金属板等の別部材を用いずに、ヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２とを導通して接合できることから、製造コストを低減することができる。また、配線されるヒーター線５、ヒーター線５の接続端部５１、５２、ワイヤーハーネス接続端子６１、６２が第１の樹脂基材３と第２の樹脂基材４で構成される基体２の内部に封止されることになるから、配線されたヒーター線５や、ヒーター線５の接続部分の防水性、耐候性、耐食性、耐傷性を確保することができる。 Further, the connection ends 51 and 52 of the heater wire 5 and the wire harness connection terminals 61 and 62 are electrically connected without using a separate member such as a metal plate for expanding the electrical connection range of the heater wire 5, for example. Since it can be joined, the manufacturing cost can be reduced. In addition, the heater wire 5 to be wired, the connection ends 51 and 52 of the heater wire 5, and the wire harness connection terminals 61 and 62 are made of the first resin base material 3 and the second resin base material 4, respectively. Since the heater wire 5 is sealed inside, waterproofness, weather resistance, corrosion resistance, and scratch resistance of the wired heater wire 5 and the connecting portion of the heater wire 5 can be ensured.
　また、近接配線領域５３をヒーター線５を蛇行状に近接配線して形成することにより、近接配線領域５３の電気的な接続範囲をより確実に広げることができ、ヒーター線５の接続端部５１、５２とワイヤーハーネス接続端子６１、６２との接合、電気的接続をより確実に行うことができる。 Further, by forming the adjacent wiring region 53 by wiring the heater wire 5 in a meandering manner, the electrical connection range of the adjacent wiring region 53 can be widened more reliably, and the connection end portion 51 of the heater wire 5 can be expanded. , 52 and the wire harness connection terminals 61, 62 can be more reliably joined and electrically connected.
　また、本実施形態の車載レーダー装置用レドーム１を製造する際に、第１の樹脂基材３の面に、近接配線領域５３に対応する箇所に近接する溝５１を有する所定パターンの溝３１を形成し、この溝３１に沿ってヒーター線５を配線することにより、容易に近接配線領域５３で構成されるヒーター線５の一方の接続端部５１と他方の接続端部５２とを形成することができる。 Further, when manufacturing the radome 1 for an in-vehicle radar device of the present embodiment, the surface of the first resin base material 3 is provided with a predetermined pattern of grooves 31 having grooves 51 close to locations corresponding to the adjacent wiring regions 53. By wiring the heater wire 5 along this groove 31, one connection end portion 51 and the other connection end portion 52 of the heater wire 5 constituted by the adjacent wiring region 53 can be easily formed. can be done.
　〔本明細書開示発明の包含範囲〕
　本明細書開示の発明は、発明として列記した各発明、実施形態の他に、適用可能な範囲で、これらの部分的な内容を本明細書開示の他の内容に変更して特定したもの、或いはこれらの内容に本明細書開示の他の内容を付加して特定したもの、或いはこれらの部分的な内容を部分的な作用効果が得られる限度で削除して上位概念化して特定したものを包含する。そして、本明細書開示の発明には下記変形例や追記した内容も含まれる。 [Scope of invention disclosed in this specification]
In addition to each invention and embodiment listed as an invention, the invention disclosed in this specification is specified by changing these partial contents to other contents disclosed in this specification within the applicable range, Alternatively, what is specified by adding other contents disclosed in this specification to these contents, or what is specified by deleting these partial contents to the extent that partial effects can be obtained and making them a broader concept contain. The invention disclosed in this specification also includes the following modifications and additional contents.
　例えば本発明の車載レーダー装置用レドームで配線されるヒーター線は全体に絶縁被覆がないヒーター線に限定されず、ワイヤーハーネス接続端子と導通接続される部分以外が絶縁被覆されているヒーター線としてもよい。この変形例では、例えば図８に示すように、第１の樹脂基材３に形成された溝３１に沿うように所定パターンで絶縁被覆されたヒーター線５ａを配線して、近接配線領域５３に対応する箇所ではヒーター線５ａを溝３１に沿って近接配線し、ヒーター線５ａが近接するように配線された近接配線領域５３で構成される絶縁被覆状態の一方の接続端部５１ｉと他方の接続端部５２ｉを形成する（図８（ａ）参照）。 For example, the heater wire wired in the radome for a vehicle-mounted radar device of the present invention is not limited to a heater wire that has no insulation coating as a whole, and may be a heater wire that has an insulation coating except for the portion that is conductively connected to the wire harness connection terminal. good. In this modification, for example, as shown in FIG. At corresponding locations, the heater wires 5a are closely wired along the grooves 31, and one connection end portion 51i in the state of insulation covering and the connection of the other are constituted by the proximity wiring regions 53 in which the heater wires 5a are wired so as to be close to each other. An end portion 52i is formed (see FIG. 8(a)).
　そして、図８（ｂ）、（ｃ）に示すように、ヒーター線５ａの絶縁被覆状態の一方の接続端部５１ｉに一のワイヤーハーネス接続端子６１を載置して、加熱されて溶融状態の導電性接合材で一方の接続端部５１ｉの絶縁被覆を除去し、温度が低下した導電性接合材により、絶縁被覆から導通材が露出した一方の接続端部５１ａと一のワイヤーハーネス接続端子６１とを固着して第１の接合部７１を形成し、一方の接続端部５１ａと一のワイヤーハーネス接続端子６１とを導通接続する。また、ヒーター線５ａの絶縁被覆状態の他方の接続端部５２ｉに他のワイヤーハーネス接続端子６２を載置して、加熱されて溶融状態の導電性接合材で他方の接続端部５２ｉの絶縁被覆を除去し、温度が低下した導電性接合材により、絶縁被覆から導通材が露出した他方の接続端部５２ａと他のワイヤーハーネス接続端子６２とを固着して第２の接合部７２を形成し、他方の接続端部５２ａと他のワイヤーハーネス接続端子６２とを導通接続する。その後は、例えば上記実施形態と同様の製造工程を行って車載レーダー装置用レドーム１を得る。 Then, as shown in FIGS. 8(b) and 8(c), one wire harness connection terminal 61 is placed on one connection end portion 51i of the heater wire 5a which is insulated and covered, and is heated and melted. The insulating coating of one connecting end portion 51i is removed with a conductive bonding material, and the one connecting end portion 51a with the conductive material exposed from the insulating coating and the one wire harness connecting terminal 61 are separated by the conductive bonding material whose temperature has decreased. are fixed to form a first joint portion 71, and one connection end portion 51a and one wire harness connection terminal 61 are electrically connected. In addition, another wire harness connection terminal 62 is placed on the other connection end portion 52i of the heater wire 5a, which is in an insulation-coated state, and the other connection end portion 52i is insulation-coated with a conductive bonding material that is heated and melted. is removed, and the other connection end portion 52a where the conductive material is exposed from the insulating coating is fixed to the other wire harness connection terminal 62 by a conductive bonding material whose temperature has been lowered to form the second bonding portion 72. , the other connection end portion 52a and another wire harness connection terminal 62 are electrically connected. After that, for example, the manufacturing process similar to that of the above-described embodiment is performed to obtain the radome 1 for an in-vehicle radar device.
　絶縁被覆されたヒーター線５ａを用いて配線する変形例において上記製造工程を用いることにより、溶融状態の導電性接合材でヒーター線５ａの接続端部５１ｉ、５２ｉの絶縁被覆を除去することができ、ヒーター線５ａの配線前に予め絶縁被覆を除去せずとも、ヒーター線５ａの接続端部５１ａ、５２ａとワイヤーハーネス接続端子６１、６２の接合、電気的接続を行うことができる。従って、絶縁被覆されたヒーター線５ａが配線される車載レーダー装置用レドーム１の製造工程を効率化することができる。 By using the above-described manufacturing process in the modification in which wiring is performed using the heater wire 5a covered with an insulation coating, the insulation coating of the connection ends 51i and 52i of the heater wire 5a can be removed with the conductive bonding material in a molten state. The connection ends 51a and 52a of the heater wire 5a and the wire harness connection terminals 61 and 62 can be joined and electrically connected without previously removing the insulating coating before wiring the heater wire 5a. Therefore, the efficiency of the manufacturing process of the radome 1 for a vehicle-mounted radar device in which the heater wire 5a coated with insulation is wired can be made more efficient.
　また、車載レーダー装置用レドーム１の別の変形例として、図９に示すように、ヒーター線５の一方の接続端部５１と一のワイヤーハーネス接続端子６１を接合する第１の接合部７１を覆うように保護する第１の被覆樹脂８１ｂを形成し、ヒーター線５の他方の接続端部５２と他のワイヤーハーネス接続端子６２を接合する第２の接合部７２を覆うように保護する第２の被覆樹脂８２ｂを形成し、第１の被覆樹脂８１ｂと第２の被覆樹脂８２ｂを基体２に埋設する構成としても良好である。この構成とする場合、第１の樹脂基材３に形成された接合部７１・７２を第１の被覆樹脂８１ｂと第２の被覆樹脂８２ｂで被覆した後に、第２の樹脂基材４を射出成形或いは接着等の固着によって設けるとよい。 As another modified example of the radome 1 for an in-vehicle radar device, as shown in FIG. A first covering resin 81 b is formed to cover and protect a second joint portion 72 that joins the other connection end portion 52 of the heater wire 5 and another wire harness connection terminal 62 . It is also possible to form the first coating resin 82b and embed the first coating resin 81b and the second coating resin 82b in the substrate 2. FIG. In this configuration, the joints 71 and 72 formed on the first resin base material 3 are coated with the first coating resin 81b and the second coating resin 82b, and then the second resin base material 4 is injected. It may be provided by molding or fixation such as adhesion.
　この被覆樹脂８１ｂ、８２ｂを用いる変形例によれば、ヒーター線５が配線された第１の樹脂基材３（又は第２の樹脂基材４）に対して、第２の樹脂基材４（又は第１の樹脂基材３）を例えば射出成形して形成する際に、被覆樹脂８１ｂ、８２ｂで接合箇所を保護することができ、射出成形時の樹脂圧で接合箇所に剥離や断線が生ずることを防止することができる。 According to the modification using the coating resins 81b and 82b, the second resin base material 4 (or Alternatively, when the first resin base material 3) is formed by injection molding, for example, the joints can be protected by the coating resins 81b and 82b, and peeling or disconnection occurs at the joints due to resin pressure during injection molding. can be prevented.
　また、車載レーダー装置用レドーム１の別の変形例として、上記実施形態の近接配線領域５３をヒーター線５を蛇行状に近接配線して形成する構成に代え、図１０に示すように、近接配線領域５３ｃを、ヒーター線５を渦巻状に近接配線して形成する構成としても好適である。この変形例では、基体２の電磁波透過領域Ｒ以外の領域である側方に突出形成されているタブ２１の領域に、それぞれ渦巻状の近接配線領域５３ｃで構成されるヒーター線５の一方の接続端部５１ｃと他方の接続端部５２ｃが設けられている。 Further, as another modified example of the radome 1 for an in-vehicle radar device, instead of forming the proximity wiring region 53 of the above-described embodiment by wiring the heater wires 5 in a meandering manner, proximity wiring is provided as shown in FIG. A configuration in which the region 53c is formed by closely wiring the heater wire 5 in a spiral shape is also suitable. In this modification, one side of the heater wire 5 is connected to the area of the tab 21 formed to protrude laterally, which is the area other than the electromagnetic wave transmission area R of the substrate 2, and is formed by the spiral adjacent wiring area 53c. An end portion 51c and the other connection end portion 52c are provided.
　この変形例でも、ヒーター線５の一方の接続端部５１ｃと一のワイヤーハーネス接続端子６１とが第１の接合部７１で固着されて導通接続され、ヒーター線５の他方の接続端部５２ｃと他のワイヤーハーネス接続端子６２とが第２の接合部７２で固着されて導通接続される。近接配線領域５３ｃにおける、近接配線されるヒーター線５の線幅、近接配線されるヒーター線５の相互間の間隔、近接配線されるヒーター線５の面占有率は、上記実施形態の近接配線領域５３と同様に設定すると好適である。尚、近接配線領域５３ｃの渦巻状は、全体が略円形の渦巻状以外に、全体が略方形の渦巻状や、全体が略三角形の渦巻状としてもよい。 Also in this modification, one connection end portion 51c of the heater wire 5 and one wire harness connection terminal 61 are fixed at the first joint portion 71 and electrically connected, and the other connection end portion 52c of the heater wire 5 is connected. The other wire harness connection terminal 62 is fixed at the second joint portion 72 to be conductively connected. In the proximity wiring region 53c, the line width of the heater wires 5 that are closely wired, the interval between the heater wires 5 that are closely wired, and the area occupancy of the heater wires 5 that are closely wired are the same as in the proximity wiring region of the above-described embodiment. 53 is preferably set. The spiral shape of the adjacent wiring region 53c may be a wholly substantially square spiral shape or a substantially triangular wholly spiral shape, in addition to the generally circular spiral shape.
　また、車載レーダー装置用レドーム１における接続端部５１、５２等を構成する近接配線領域５３、５３ｃ等は、第１の樹脂基材３（又は第２の樹脂基材４）の平面の部分に形成する以外に、第１の樹脂基材３（又は第２の樹脂基材４）の曲面の部分に形成する構成としてもよく、更には、第１の樹脂基材３（又は第２の樹脂基材４）の屈曲した部分に形成する構成とすることも可能である。 In addition, the adjacent wiring regions 53, 53c, etc. constituting the connection end portions 51, 52, etc. of the radome 1 for an in-vehicle radar device are formed on the planar portion of the first resin base material 3 (or the second resin base material 4). In addition to forming, it may be configured to be formed on the curved surface portion of the first resin base material 3 (or the second resin base material 4). It is also possible to adopt a configuration in which it is formed on a bent portion of the base material 4).
　また、本発明の車載レーダー装置用レドームには、ヒーター線の少なくとも一方の接続端部が、ヒーター線が近接するように配線された近接配線領域で構成され、ヒーター線の一方の接続端部にワイヤーハーネス接続端子が載置され、ヒーター線の一方の接続端部とワイヤーハーネス接続端子とが導電性接合材からなる接合部で固着される適宜の構成が含まれ、例えばヒーター線の他方の接続端部が単に線状に形成されて、他方の接続端部と他のワイヤーハーネス接続端子とが導電性の金属板に載置され、金属板上で他方の接続端部と他のワイヤーハーネス接続端子とが導電性接合材の接合部で固着され、導通接続される構成も含まれる。 Further, in the radome for an in-vehicle radar device of the present invention, at least one connection end of the heater wire is configured by a proximity wiring region in which the heater wire is wired in close proximity, and the one connection end of the heater wire An appropriate configuration is included in which the wire harness connection terminal is placed and one connection end of the heater wire and the wire harness connection terminal are fixed by a joint made of a conductive bonding material, for example, the other connection of the heater wire The other connection end and the other wire harness connection terminal are placed on a conductive metal plate, and the other connection end and the other wire harness are connected on the metal plate. It also includes a configuration in which the terminal is fixed at a joint portion of a conductive bonding material and conductively connected.
　また、上記実施形態では、レドーム正面視で側方に突出形成されているタブ２１の領域でヒーター線５の接続端部５１、５２等とワイヤーハーネス接続端子６１、６２との導通接続を行う構成としたが、例えばタブ２１を有しないレドームの場合など、タブ２１の領域以外でも、電磁波透過領域Ｒ以外の所要の領域にこの構成を設置することが可能である。 Further, in the above-described embodiment, the connection ends 51, 52, etc. of the heater wire 5 and the wire harness connection terminals 61, 62 are conductively connected in the region of the tab 21 formed to protrude laterally when viewed from the front of the radome. However, for example, in the case of a radome that does not have the tab 21, it is possible to install this configuration in a required area other than the electromagnetic wave transmission area R, even outside the tab 21 area.
　本発明は、車載レーダー装置用レドームに利用することができる。 The present invention can be used for radomes for in-vehicle radar devices.
１…車載レーダー装置用レドーム　２…基体　２１…タブ　３…第１の樹脂基材　３１…溝　４…第２の樹脂基材　４１…溝　５、５ａ…ヒーター線　５１、５１ａ、５１ｃ…一方の接続端部　５２、５２ａ、５２ｃ…他方の接続端部　５３、５３ｃ…近接配線領域　５１ｉ、５２ｉ…絶縁被覆状態の接続端部　６…ワイヤーハーネス接続部　６１…一のワイヤーハーネス接続端子　６２…他のワイヤーハーネス接続端子　７１…第１の接合部　７２…第２の接合部　８１ｂ…第１の被覆樹脂　８２ｂ…第２の被覆樹脂　１００…金型　１０１…注入口　１０２…導出口　Ｒ…電磁波照射領域　ＭＲ…溶融樹脂
  DESCRIPTION OF SYMBOLS 1... Radome for vehicle-mounted radar apparatus 2... Base 21... Tab 3... First resin base material 31... Groove 4... Second resin base material 41... Groove 5, 5a... Heater wire 51, 51a, 51c... One connection Ends 52, 52a, 52c... Other connection ends 53, 53c... Proximity wiring area 51i, 52i... Connection ends in an insulating coating state 6... Wire harness connection part 61... One wire harness connection terminal 62... Other wire Harness connection terminal 71 First junction 72 Second junction 81b First coating resin 82b Second coating resin 100 Mold 101 Inlet 102 Outlet R Electromagnetic wave irradiation region MR molten resin

Claims (6)

  1. 　電磁波透過性の基体の面方向に配線されるヒーター線を備え、
    　第１の樹脂基材と第２の樹脂基材を積層配置して固着されることにより前記基体が構成され、
    　前記第１の樹脂基材と前記第２の樹脂基材との間に溝に沿うように配線される前記ヒーター線が埋設され、
    　前記ヒーター線の少なくとも一方の接続端部が、前記ヒーター線が近接するように配線された近接配線領域で構成され、
    　前記ヒーター線の一方の接続端部にワイヤーハーネス接続端子が載置され、
    　前記ヒーター線の一方の接続端部と前記ワイヤーハーネス接続端子とが導電性接合材からなる接合部で固着され、
    　前記接合部が前記基体に埋設されていることを特徴とする車載レーダー装置用レドーム。     Equipped with a heater wire wired in the surface direction of the electromagnetic wave transparent substrate,
    The substrate is configured by laminating and fixing a first resin base material and a second resin base material,
    The heater wire wired along the groove is embedded between the first resin base material and the second resin base material,
    At least one connection end of the heater wire is configured with a proximity wiring region in which the heater wire is wired in close proximity,
    A wire harness connection terminal is placed on one connection end of the heater wire,
    one connection end portion of the heater wire and the wire harness connection terminal are fixed at a joint portion made of a conductive bonding material;
    A radome for a vehicle-mounted radar device, wherein the joint portion is embedded in the base.
  2. 　前記ヒーター線の一方の接続端部と他方の接続端部のそれぞれが、前記ヒーター線が近接するように配線された近接配線領域で構成され、
    　前記ヒーター線の一方の接続端部に一のワイヤーハーネス接続端子が載置され、
    　前記ヒーター線の他方の接続端部に他のワイヤーハーネス接続端子が載置され、
    　前記ヒーター線の一方の接続端部と前記一のワイヤーハーネス接続端子とが導電性接合材からなる第１の接合部で固着され、
    　前記ヒーター線の他方の接続端部と前記他のワイヤーハーネス接続端子とが導電性接合材からなる第２の接合部で固着され、
    　前記第１の接合部と前記第２の接合部とが前記基体に埋設されていることを特徴とする請求項１記載の車載レーダー装置用レドーム。     Each of one connection end portion and the other connection end portion of the heater wire is configured by a proximity wiring region in which the heater wire is wired so as to be close to each other,
    A wire harness connection terminal is placed on one connection end of the heater wire,
    Another wire harness connection terminal is placed on the other connection end of the heater wire,
    One connection end of the heater wire and the one wire harness connection terminal are fixed at a first joint made of a conductive joint material,
    The other connection end portion of the heater wire and the other wire harness connection terminal are fixed by a second joint portion made of a conductive joint material,
    2. The radome for a vehicle-mounted radar device according to claim 1, wherein said first joint portion and said second joint portion are embedded in said base.
  3. 　前記近接配線領域が、前記ヒーター線を蛇行状に近接配線して形成されている、若しくは前記ヒーター線を渦巻状に近接配線して形成されていることを特徴とする請求項１又は２記載の車載レーダー装置用レドーム。 3. The proximity wiring region according to claim 1, wherein the proximity wiring region is formed by wiring the heater wires in a meandering manner, or by wiring the heater wires in a spiral manner. Radome for in-vehicle radar equipment.
  4. 　前記接合部を覆うように被覆樹脂が形成され、
    　前記被覆樹脂が前記基体に埋設されていることを特徴とする請求項１～３の何れかに記載の車載レーダー装置用レドーム。     A coating resin is formed so as to cover the joint,
    4. The radome for a vehicle-mounted radar device according to claim 1, wherein said coating resin is embedded in said base.
  5. 　請求項２記載の車載レーダー装置用レドームの製造方法であって、
    　前記第１の樹脂基材の前記第２の樹脂基材が積層される側の面に所定パターンで溝を形成して、前記近接配線領域に対応する箇所に近接する溝を形成する第１工程と、
    　前記溝に沿うようにヒーター線を配線して、前記ヒーター線が近接するように配線された近接配線領域で構成される前記ヒーター線の一方の接続端部と他方の接続端部とを形成する第２工程と、
    　前記ヒーター線の一方の接続端部に一のワイヤーハーネス接続端子を載置して、前記一方の接続端部と前記一のワイヤーハーネス接続端子とを導電性接合材で固着して第１の接合部を形成すると共に、前記ヒーター線の他方の接続端部に他のワイヤーハーネス接続端子を載置して、前記他方の接続端部と前記他のワイヤーハーネス接続端子とを導電性接合材で固着して第２の接合部を形成する第３工程と、
    　前記第２の樹脂基材を射出成形で形成して前記第１の樹脂基材に固着すると共に、前記第１の樹脂基材と前記第２の樹脂基材との間に、前記ヒーター線、前記一のワイヤーハーネス接続端子、前記第１の接合部、前記他のワイヤーハーネス接続端子、前記第２の接合部を埋設する第４工程を備えることを特徴とする車載レーダー装置用レドームの製造方法。     A method for manufacturing a radome for a vehicle-mounted radar device according to claim 2,
    A first step of forming grooves in a predetermined pattern on the surface of the first resin base material on which the second resin base material is laminated to form grooves adjacent to locations corresponding to the adjacent wiring regions. and,
    A heater wire is wired along the groove to form one connection end portion and the other connection end portion of the heater wire, which are constituted by a proximity wiring region in which the heater wire is wired so as to be close to each other. a second step;
    One wire harness connection terminal is placed on one connection end of the heater wire, and the one connection end and the one wire harness connection terminal are fixed with a conductive bonding material to perform a first bonding. A portion is formed, another wire harness connection terminal is placed on the other connection end of the heater wire, and the other connection end and the other wire harness connection terminal are fixed with a conductive bonding material. a third step of forming a second joint by
    The second resin base material is formed by injection molding and fixed to the first resin base material, and the heater wire is provided between the first resin base material and the second resin base material, A method for manufacturing a radome for a vehicle-mounted radar device, comprising a fourth step of embedding the one wire harness connection terminal, the first joint portion, the other wire harness connection terminal, and the second joint portion. .
  6. 　前記第３工程において、加熱されて溶融状態の導電性接合材で前記ヒーター線の一方の接続端部の絶縁被覆と他方の接続端部の絶縁被覆を除去し、温度が低下した導電性接合材により、前記一方の接続端部と前記一のワイヤーハーネス接続端子とを固着し、前記他方の接続端部と前記他のワイヤーハーネス接続端子とを固着することを特徴とする請求項５記載の車載レーダー装置用レドームの製造方法。
          In the third step, the insulating coating on one connection end of the heater wire and the insulating coating on the other connection end of the heater wire are removed with the conductive bonding material that is heated and melted, and the temperature of the conductive bonding material is lowered. 6. The in-vehicle vehicle according to claim 5, wherein the one connection end and the one wire harness connection terminal are fixed, and the other connection end and the other wire harness connection terminal are fixed by A method for manufacturing a radome for a radar device.
PCT/JP2023/000673 2022-03-01 2023-01-12 Radome for vehicle-mounted radar device, and method for manufacturing same WO2023166860A1 (en)

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