JP4643898B2 - Vehicle antenna and mounting method thereof - Google Patents

Description

  The present invention relates to a structure of a vehicular antenna, particularly a vehicular antenna incorporating an amplifier for amplifying a received signal, and a mounting method thereof.

  For vehicles, various types of antennas are provided corresponding to the types of radio waves corresponding to broadcasting such as radios, vehicle telephones, and vehicle information services, as well as vehicle design requirements. Among them, an antenna called a roof antenna that is attached to the roof of a vehicle is known. The roof antenna is considered part of the vehicle except for the part that can be removed or stored. When the roof antenna is installed, in order to avoid changing the vehicle height, the fixed part of the roof antenna is attached to the lower position of the curved roof, and its apex is lower than the apex of the curved roof It is common to do. For this reason, the fixed portion of the roof antenna that protrudes outside the vehicle and cannot be removed is required to be small, particularly low in height. In addition, it is advantageous that the portion protruding from the vehicle is small in terms of aerodynamics. If the protruding amount of the roof antenna is small, restrictions on the vehicle body, in particular, the shape of the roof and its vicinity, and the design are reduced, and the selection range of the antenna mounting position is also widened.

  In addition, since the antenna element of the roof antenna is relatively small, an amplifier that amplifies the received signal is necessary. If this amplifier is placed in a fixed part outside the vehicle, the size of the roof antenna can be reduced. It becomes a restriction. Thus, for example, as disclosed in Patent Document 1 below, a vehicle antenna has been proposed in which an antenna element is disposed outside the vehicle and a substrate on which an amplifier is mounted is disposed inside the vehicle. By disposing the amplifier board inside the vehicle, it is possible to reduce the shape of the outside of the vehicle.

JP-A-9-69708

  As described in the above publication, when the amplifier board is arranged inside the vehicle, immediately before the antenna is attached to the vehicle body, the vehicle is composed of an outer portion of the vehicle, an inner portion, and a nut for connecting them. ing. Attaching a three-part device by one person has the problem of poor workability.

  An object of the present invention is to improve workability of attaching a vehicle antenna to a vehicle body.

In the vehicle antenna according to the present invention, a bolt portion is provided on a base that supports an antenna element, and a nut is previously rotatably coupled to an amplifier case that houses an amplifier board. By connecting the nut to the amplifier case so as to be pivotable in advance, it is configured as two parts on the inside and outside of the vehicle immediately before mounting the antenna, improving workability during mounting. . The amplifier case is provided with a triangular claw integrally with the case, and the triangular claw contacts the vehicle body panel when the antenna is attached.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a vehicle antenna 10 of the present embodiment, FIG. 2 is a sectional view of the antenna 10 attached to a vehicle body, and FIG. 3 shows a state immediately before the antenna 10 is attached to the vehicle body. FIG. In the present embodiment, the vehicular antenna 10 is described as a so-called short pole antenna having a pole 12 of about 20 to 30 cm with a built-in antenna element. However, the present invention is not limited to this.

  The joint 14 coupled to the base of the pole 12 is pivotably coupled to a pivot shaft base 18 fixed to the base 16. The base 16 is made of a die-cast metal such as aluminum, and the pivot shaft base 18 is fixed thereon. As shown well in FIG. 2, the pivot shaft base 18 has a substantially U-shape opening upward in the drawing, and the pivot shaft 20 is bridged between two opposite sides of the U-shape. I support it. The pivot shaft 20 passes through a hole provided in the joint 14 and supports the pole 12 so as to be pivotable. Further, the turning shaft 20 is threaded, and by tightening this screw, the joint 14 is held between the two U-shaped sides of the turning shaft base 18, and the joint 14 is moved to a predetermined position within the turning range. It is fixed to.

  The base 16 includes a plate portion 22 having a substantially circular or elliptical plate shape to which the turning shaft base 18 is fixed, and a bolt portion 24 extending in a substantially normal direction from a surface opposite to the turning shaft base 18 from the plate portion 22. have. Both the plate part 22 and the bolt part 24 are integrally formed by die casting. Further, a seal rubber 26 is joined to the periphery of the plate portion 22 by integral molding. In FIG. 1, the seal rubber 26 is divided into left and right parts, but this is for the purpose of clarifying the internal structure, and actually has an unbroken annular shape. Furthermore, an outer case 28 that covers the upper surface of the plate portion 22, the pivot shaft base 18, and the joint 14 is provided. The outer case 28 is also divided and shown in FIG. 1 as in the case of the seal rubber 26, but is actually an integral one. Further, a notch 30 is provided at the rear end of the outer case 28 so as not to interfere with the pole when it turns.

  A claw holder 34 having a temporary fixing claw 32 is fixed to the surface of the plate part 22 of the base 16 on the side where the bolt part 24 is provided by two screws 36. The claw holder 34 is made of resin, and the temporary fixing claw 32 has elasticity. The temporary fixing claw 32 uses its elasticity to temporarily fix the base 16 and the configuration of the outside of the vehicle such as the pole 12 assembled thereto to a predetermined hole opened in the panel 38 constituting the vehicle body. Used. The claw holder 34 also has a shape that surrounds the periphery of the bolt portion 24. In particular, the outer shape of the cross section orthogonal to the axis of the bolt portion 24 of the portion that extends inside the vehicle when assembled is a substantially rectangular shape.

  An amplifier board 40 on which an amplifier circuit element for amplifying a signal received by the antenna element is mounted is housed in an amplifier case 46 including an amplifier case body 42 and an amplifier cover 44. The amplifier case main body 42 is a metal press-molded product, and has a hole through which the bolt portion 24 passes in the center. Around this hole, a triangular claw 48 protruding toward the panel 38 of the vehicle body is provided. Further, the peripheral edge of this hole has a cylindrical wall surface extending in the opposite direction to the panel 38 when attached, that is, a downwardly extending cylindrical wall in FIG. A flange 50 is provided. A rotation stopper 52 is fixed in the hole of the amplifier case main body 42. The rotation stopper 52 can be made of resin, and is engaged with the triangular claw 48 to prevent rotation with respect to the amplifier case main body 42. The rotation stopper 52 is provided with a hole in the center so that the bolt part 24 can penetrate, and the shape of the inner wall surface of this hole is a shape that fits the substantially rectangular outer shape of the claw holder 34 described above. Yes. By this engagement, relative rotation between the base 16, that is, the structure outside the vehicle, and the amplifier case 46, that is, the structure inside the vehicle is suppressed. The inner diameter shape of the rotation stopper 52 and the hole inner diameter of the claw holder 34 may be other than a square as long as the relative rotation is regulated. The amplifier board 40 is fixed to the amplifier case main body 42 by screws 54 and is grounded to the amplifier case main body 42 by a lead wire (not shown).

  A nut 62 with a caulking portion is coupled to the inward flange 50 with an insulating washer 56, a contact plate 58, and a conductive washer 60 interposed therebetween. The nut 62 with a caulking portion is a general hexagonal nut provided with a thin cylindrical caulking portion 64 coaxially with the axis thereof. The cylindrical tip is expanded as shown in the figure and is engaged with the inward flange 50. Combined and caulked. At this time, the nut is coupled to the amplifier case body 42 and cannot be removed, but is allowed to rotate. The insulating washer 56 electrically insulates the transmission path of a signal from the antenna element such as the bolt portion 24 with respect to the amplifier case main body 42 in contact with the panel 38 of the vehicle body. A reception signal is transmitted from the bolt part 24 to the pattern of the amplifier board through the nut 62 with caulking part, the conductive washer 60, and the contact plate 58. The amplifier cover 44 is engaged with the amplifier case main body 42 by elastic claws 66 to cover the amplifier board and the like, but a hole is provided so as to expose the nut 62 with caulking portion to the outside (see FIG. 3). .

  Next, assembly of the vehicle antenna and attachment to the vehicle body will be described. A seal rubber 26 is coupled to the base 16 by integral molding. The pivot 16 and the joint 14 are coupled to the base 16, and an outer case is covered so as to cover it. Then, the pole 12 is coupled to the joint 14, and the claw holder 34 is screwed to the base 16. Thereby, the assembly of the outer portion of the vehicle is completed.

  On the other hand, at the inner part of the vehicle, first, the amplifier board 40 is screwed to the amplifier case body 42. Further, the conductive washer 60, the contact plate 58, and the insulating washer 56 are passed through the caulking portion 64 of the nut 62 with caulking portion that has not been expanded yet in this order, and the caulking portion 64 is placed at the center of the amplifier case body 42. Insert into the hole. Then, the tip of the caulking portion 64 is expanded and engaged with the inward flange 50. As a result, the crimped nut 62 is coupled to the amplifier case main body 42. As described above, in this state, the nut 62 with the caulking portion cannot be removed from the amplifier case main body 42, but can be rotated. On the other hand, a rotation stopper 52 is coupled to the surface of the amplifier case body 42 facing the outside of the vehicle. Then, an amplifier cover 44 is attached to the amplifier case body 42.

  The state assembled so far is shown in FIG. 3, which is one part for each of the vehicle outer side and the inner side.

  When attaching to the vehicle body, first, a portion outside the vehicle is engaged with an attachment hole provided in the panel 38. At this time, the temporary fixing claw 32 is engaged with the edge of the attachment hole, and is temporarily fixed. When this state is viewed from the inside of the vehicle, the tip of the claw holder 34 and the bolt portion 24 appear to protrude from the mounting holes of the panel 38. An amplifier case 46 is attached to the protruding portion from the inside of the vehicle. The outer peripheral shape of the claw holder 34 and the inner peripheral shape of the rotation stopper 52 fit each other. Then, the nut 62 with caulking portion is turned and screwed to the bolt portion 24. At this time, since the claw holder 34 and the rotation stopper 52 are fitted together, it is possible to prevent the respective components from rotating relatively. When the caulking nut 62 is tightened, the vehicle body panel 38 is held between the base 16 and the amplifier case 46, and the vehicle antenna 10 is attached to the vehicle body and fixed. Further, at the time of fixing, the triangular pawl 48 comes into contact with the panel 38 of the vehicle body and is grounded. Further, the contact plate 58 is held by the inward flange 50 and the nut 62 with the caulking portion, and the contact provided at the tip of the portion extending outward in the radial direction is pressed toward the amplifier substrate 40. As a result, the contact contacts a predetermined pattern on the amplifier board.

  As described above, in this embodiment, caulking is used to rotatably couple the nut to the amplifier case. However, any other means can be used as long as it does not easily come off. It is. For example, a notch is provided at one or a plurality of locations of the inward flange 50 of the amplifier case main body 42 of the present embodiment. On the other hand, on the nut side, the end of the thin cylinder before caulking of the present embodiment A claw that goes out of the waveform direction can be provided in accordance with the position of the notch of the flange 50. When attaching to the nut, align the notch and the claw, insert the claw deeper than the flange, and then turn the nut to engage the flange and the claw so that the nut cannot be removed.

  As described above, when the vehicle antenna 10 is attached, immediately before the attachment, there are two parts in total, one on the outside and one on the inside of the vehicle, so that workability is improved. The workability is also improved by temporarily fixing the outer parts to the mounting position of the vehicle body.

It is a disassembled perspective view of the vehicle antenna of this embodiment. It is sectional drawing in the attachment state of the vehicle antenna of this embodiment. It is a figure which shows the state just before the attachment to the vehicle of the vehicle antenna of this embodiment.

Explanation of symbols

  10 Vehicle antenna, 12 pole, 16 base, 22 plate part, 24 bolt part, 32 temporary fixing claw, 34 claw holder, 38 panel, 40 amplifier board, 42 amplifier case body, 44 amplifier cover, 46 amplifier case, 50 inside Orientation flange, 52 Detent, 62 Nut with caulking part, 64 Caulking part.

Claims (3)

A vehicle antenna attached to a vehicle,
An antenna element;
A base that supports the antenna element and has a bolt portion;
An amplifier case containing an amplifier board on which a circuit for amplifying a signal received by the antenna element is mounted;
A nut that is rotatably coupled to the amplifier case and is screwed to the bolt portion of the base;
Triangular claws provided integrally with the amplifier case and in contact with the vehicle body panel when the vehicle antenna is attached to the vehicle;
A vehicle antenna having: The vehicle antenna according to claim 1,
The base is disposed so that a bolt portion of the base protrudes toward the inside of the vehicle in a hole formed in a mounting position of the vehicle antenna of the vehicle body panel of the vehicle,
The amplifier case is disposed inside the vehicle and holds the vehicle body panel together with the base.
This is fixed to the car body,
Vehicle antenna. A method of attaching a vehicle antenna to a vehicle body,
Passing the bolt portion of the base supporting the antenna element from the outside of the vehicle through a hole formed in the panel of the vehicle body;
An amplifier case that houses an amplifier board on which an amplifier circuit is mounted is coupled to the base from the inside of the vehicle by engaging a nut that is rotatably coupled to the amplifier case in advance with the bolt portion. Holding the vehicle body panel between the amplifier case and the base, fixing the vehicle antenna to the vehicle body, and bringing the triangular claws integrally provided in the amplifier case into contact with the vehicle body panel at the time of fixing;
A method for mounting a vehicular antenna.

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