JP2009049695A - Mounting structure for vehicle antenna device - Google Patents

Abstract

An object of the present invention is to provide a mounting structure for an antenna device for a vehicle that can perform the work of mounting the antenna device and grounding from the outside of the vehicle.
A vehicle antenna device 10 disposed on a front surface side of a roof panel 30 having conductivity, and a ground plate 31 electrically connected to the back surface of the roof panel 30 and disposed below the through hole 30c. And a conductive spring 13 provided in the through direction of the through hole 30c and connected to the ground pattern of the circuit board 12 connected to the antenna element 11 built in the vehicle antenna device 10 and the ground plate 31. Device mounting structure.
[Selection] Figure 1

Description

  The present invention relates to a mounting structure for a vehicle antenna device to be mounted on a vehicle outer plate.

2. Description of the Related Art Conventionally, as a structure for attaching an antenna device to a vehicle roof, a bolt that protrudes downward from the antenna device is inserted into a through hole of the roof, and a nut is screwed into the bolt to fix the antenna device to the roof. Is known (see, for example, Patent Documents 1 and 2).
JP-A-6-188614 JP 2006-246052 A

  However, in the above-described conventional technology, the antenna device can be attached to the roof by bringing the nut screwed into the bolt into contact with the roof, and the antenna device can be grounded via the nut and the bolt. Since it is necessary to screw the nut from the inside of the vehicle, the installation work and grounding work cannot be performed from the outside of the vehicle, and workability may be poor. For example, when exchanging the antenna device, it is necessary to remove the roof trim on the vehicle interior side.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mounting structure for a vehicle antenna device that can perform the work of mounting the antenna device and grounding from the outside of the vehicle.

In order to achieve the above object, a mounting structure for a vehicle antenna device according to a first invention is:
An antenna device disposed on the surface side of the outer plate of the vehicle;
A grounding member disposed on the back side of the outer plate;
It is provided in the penetration direction of the through-hole of the said outer plate, and is provided with the elastic body which has the electroconductivity which touches the said antenna apparatus and the said earth member.

2nd invention is the attachment structure of the antenna apparatus for vehicles which concerns on 1st invention, Comprising:
The elastic body electrically connects the circuit board to which the antenna element of the antenna device is connected and the ground member.

3rd invention is the attachment structure of the vehicle antenna apparatus which concerns on 1st or 2nd invention, Comprising:
The elastic body is in contact with the ground member in the penetration direction.

A fourth invention is a mounting structure for a vehicle antenna device according to any one of the first to third inventions,
The ground member is a plate-like body having a contact surface with the elastic body.

A fifth invention is a mounting structure of a vehicle antenna device according to any one of the first to fourth inventions,
The ground member is electrically connected to the back surface of the outer plate.

A sixth invention is a mounting structure for a vehicle antenna device according to any one of the first to fifth inventions,
The ground member is disposed between the outer plate and a vehicle interior.

A seventh invention is a mounting structure for a vehicle antenna device according to any one of the first to sixth inventions,
The outer plate is a roof panel.

An eighth invention is a mounting structure for a vehicle antenna device according to any one of the first to seventh inventions,
The antenna device includes a fixing means for fixing the antenna device to the surface side by a magnetic force.

The ninth invention is a mounting structure of a vehicle antenna device according to the first invention,
The opening of the through hole has a size that allows at least insertion of in-vehicle wiring connected to the vehicle antenna device.

  According to the present invention, the antenna device can be attached and grounded from outside the vehicle.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The vehicle antenna device according to the present embodiment is a vehicle-mounted antenna device for wirelessly connecting to a communication facility outside the vehicle. The vehicle antenna device is, for example, an AM wave, an FM wave, a TV broadcast wave, a vehicle position information such as a GPS signal, vehicle registration information, audio information, image information, emergency call information, call information, inter-vehicle communication information, ETC Used to send and receive data such as communication information.

  FIG. 1 is a schematic cross-sectional view showing a first example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. The vehicular antenna device 10 is installed on the upper side (that is, outside the passenger compartment) of the roof panel 30 of the vehicle. Installation on the upper surface (front surface) of the roof panel 30 makes it difficult for radio waves to be blocked and improves communication quality.

  The vehicle antenna device 10 is covered with a housing 15 made of an insulating member such as resin. Inside the casing 15 are an antenna element 11, a circuit board 12 on which an electronic circuit such as an amplifier that transmits a high-frequency signal to the antenna element 11 is mounted, and a magnet 14 a for fixing the vehicle antenna device 10 to the roof panel 30. , 14b are arranged. The housing 15 is attached so as to cover the antenna element 11, the circuit board 12, and the like, and protects each component such as the antenna element 11. The housing 15 is composed of, for example, a lower cover and an upper cover. The lower surface of the lower cover is in direct contact with the upper surface of the roof panel 30 or indirectly through a protective member or the like. In addition, the housing | casing 15 does not need to be specifically limited to the shape of illustration.

  The antenna element 11 is formed such that the length from the feeding point resonates with the frequency of the target communication radio wave (for example, a half wavelength of the communication radio wave), for example, as a monopole antenna It is formed. The antenna element 11 is electrically connected to an electronic circuit such as an amplifier circuit mounted on the circuit board 12 and supplied with a high frequency current.

  The circuit board 12 is appropriately fixed to the lower cover by screwing, snap-fit, or the like at a predetermined distance from the inner surface of the lower cover of the housing 15 in contact with the roof panel 30. The circuit board 12 is appropriately connected with a coaxial cable 16 for connecting the vehicular antenna device 10 such as a communication device mounted at an appropriate position in the vehicle to an electronic device that uses the antenna. The coaxial cable 16 may be connected to the lower surface or the upper surface of the circuit board 12. The core wire of the coaxial cable 16 is connected to an electronic circuit such as an amplifier circuit mounted on the circuit board 12 by soldering or the like, and the coaxial cable 16 is connected to the ground pattern of the circuit board 12 (the ground potential portion serving as the reference potential of the circuit board 12). Are connected by soldering or the like.

  The coaxial cable 16 is exposed from a through hole provided in the lower cover of the housing 15, and a connector 17 is provided at the end opposite to the connection end with the circuit board 12. The coaxial cable 16 inserted through the through hole in the lower cover of the housing 15 and the through hole 30c provided in the roof panel 30 is connected to the coaxial cable 34 routed in the vehicle. The coaxial cable 16 and the coaxial cable 34 are connected by fitting the respective connectors 17 and 33. The other end of the coaxial cable 34 is connected to an electronic device having a communication function mounted at an appropriate position in the vehicle. The coaxial cable 34 passes through a space between the roof trim 32 and the roof panel that separates the interior space for the passenger from the roof panel 30.

  Further, since it is necessary to take the body ground of the vehicle antenna device 10, the ground pattern of the circuit board 12 is electrically connected to the vehicle body or a conductor electrically connected to the vehicle body. Is connected to a conductive spring 13. The conductive spring 13 literally has conductivity and elasticity. Examples of the material having such characteristics include metals such as titanium. The conductive spring 13 is preferably subjected to a rust prevention treatment such as plating.

  One end of the conductive spring 13 is connected to the ground pattern by soldering or the like on the lower surface of the circuit board 12. The natural length of the conductive spring 13 is longer than the distance between the lower surface of the circuit board 12 and the upper surface of the ground plate 31 described later in a state where the housing 15 is attached to the surface of the roof panel 30. As a result, when the housing 15 is attached to the surface of the roof panel 30, the conductive spring 13 is contracted in an elastically deformed state. That is, the end of the conductive spring 13 opposite to the connection end with the circuit board 12 is in contact with the ground plate 31 in a state where the housing 15 is attached to the surface of the roof panel 30.

  The ground plate 31 is electrically connected to the back surface of the roof panel 30 of a conductor (for example, a steel plate) as a conductive interior metal. Since the back surface of the roof panel 30 that is a part of the vehicle body is not painted, connecting the ground plate 31 to the back surface ensures a grounding of the body as compared with the case of connecting to the surface of the painted roof panel 30. be able to. The back surface of the roof panel 30 and the ground plate 31 may be connected using an appropriate connection means for ensuring conductivity such as welding or rivet connection. The ground plate 31 is fixed in a space between the roof trim 32 and the roof panel 30.

  The ground plate 31 is fixed so that a surface facing the lower surface of the circuit board 12 is formed. In the case of FIG. 1, the conductive spring 13 contacts the upper surface of the ground plate 31. The contact between the ground plate 31 and the conductive spring 13 may not be fixed. Further, the contact surface of the ground plate 31 with the conductive spring 13 may be flat, or when the conductive spring 13 comes into contact with the upper surface of the ground plate 31, the conductive spring 13 is prevented from shifting from the contact position. You may provide the receiving shape (for example, recessed part and convex part) which suits the shape of the edge part.

  The magnets 14a and 14b are attached to the inner surface of the lower cover of the housing 15, and may be fixed by an appropriate fixing means such as an adhesive such as a double-sided tape or adhesive, a snap fit, or a bolt / nut. Due to the magnetic force of the magnets 14a and 14b, the roof panel 30 made of a material to which an attractive force due to the magnetic force acts and the lower surface of the housing 15 are fixed.

  FIG. 2 is a view showing a method of attaching the vehicle antenna device 10 from the outside of the vehicle. The operator takes out the coaxial cable 34 that is the vehicle side wiring from the through hole 30 c, and connects the connector 17 of the coaxial cable 16 that extends from the through hole of the lower cover of the housing 15 of the vehicle antenna device 10 to the connector of the coaxial cable 34. 33. Then, the operator inserts the conductive spring 13 into the through hole 30c so as to contact the ground plate 31 located below the through hole 30c, and protrudes downward from the lower cover of the casing 15 of the vehicle antenna device 10. The positioning members 18a and 18b provided are inserted into the alignment holes 30a and 30b provided in the roof panel 30. Therefore, it is preferable that the opening of the through hole 30c has such a size that the coaxial cable 34 can be easily taken out and the conductive spring 13 can be easily inserted. By providing the positioning members 18a and 18b and the alignment holes 30a and 30b, the vehicle antenna device 10 can be easily attached at a position where the vehicle antenna device 10 is to be attached. The vehicle antenna device 10 is fixed in a state where the lower cover of the housing 15 is in contact with the surface of the roof panel 30 by the magnetic force of the magnets 14a and 14b.

  In this way, the worker can attach the vehicle antenna device 10 from outside the vehicle to a predetermined attachment position while taking the ground. Moreover, by attaching in this way, the conductive spring 13 comes into contact with the ground plate 31 in a compressed state within an elastic range. As a result, the height of attachment of the vehicle antenna device 10 and the adjustment of the contact pressure can be adjusted using the elastic force of the conductive spring 13. That is, the mounting variation of the ground plate 31 (for example, the dimensional variation from the contact surface of the ground plate 31 with the conductive spring 13 to the roof panel 30) or the mounting variation of the circuit board 12 (for example, the circuit from the lower cover of the housing 15 to the circuit). Therefore, variations in the mounting position and mounting pressure in the elastic deformation direction of the conductive springs 13 can be adjusted by elastic deformation of the conductive springs 13.

  FIG. 3 is a schematic cross-sectional view showing a second example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  In the second embodiment, a combination of the conductive spring 13 and the conductive rubber 20 is shown as an elastic body having conductivity interposed between the circuit board 12 and the ground plate 31. Providing the conductive rubber 20 prevents the conductive spring 13 from protruding from the lower surface of the housing 15 and improves the handleability. The conductive rubber 20 is a conductive resin having elasticity. The elastic modulus of the conductive rubber 20 is, for example, higher than that of the conductive spring 13. A metal layer may be formed on the surface of the conductive rubber 20. The columnar conductive rubber 20 has one surface facing the lower surface of the circuit board 12 and the other surface in contact with the upper surface of the ground plate 31 with the housing 15 attached to the surface of the roof panel 30. It is fixed by the stoppers 21a and 21b. The conductive spring 13 is interposed in contact with the lower surface of the circuit board 12 and the upper surface of the conductive rubber 20. The conductive spring 13 contacts the upper surface of the conductive rubber 20, and the contact does not have to be fixed. Moreover, in order to ensure the wiring path | route of the coaxial cable 16, as shown in FIG. 4, you may provide the groove | channel 20a from the bottom face (upper surface) to the side surface of the conductive rubber 20 of a pillar.

  The mounting method of the vehicle antenna device 10 shown in FIG. 3 from the outside of the vehicle is the same as the mounting method of FIG. That is, the operator inserts the conductive rubber 20 into the through hole 30c so as to contact the ground plate 31 after the connector 17 of the coaxial cable 16 is fitted to the connector 33 of the coaxial cable 34, and the positioning members 18a and 18b. May be inserted into the alignment holes 30a and 30b.

  FIG. 5 is a schematic cross-sectional view showing a third example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  A connection terminal 23, which is a conductive elastic body, is disposed on the surface side in the through direction of the through hole 30 c and below the circuit board 12, and is electrically connected to the ground pattern of the circuit board 12 via the wire 24. Connected. On the other hand, the L-shaped ground plate 41 is disposed on the back side of the roof panel 30 and is electrically connected to the back side. The end of the ground plate 41 protrudes in the through direction of the through hole 30 c so that the end of the ground plate 41 can be fitted to the connection terminal 23.

  FIG. 6 is an enlarged view of a fitting portion between the ground plate 41 and the connection terminal 23. The connection terminal 23 connected to the ground pattern of the circuit board 12 by the wire 24 is bent into a concave shape that can be fitted to the end of the ground plate 41. When the end of the ground plate 41 is inserted into the recess, the end of the ground plate 41 is opened while contacting the ground plate 41 in the direction perpendicular to the insertion direction (the arrow direction in the figure) within the range of elastic deformation. Secure with the part sandwiched.

  When the vehicle antenna device 10 shown in FIG. 5 is attached from the outside of the vehicle, it is the same as the attachment method of FIG. That is, the operator fits the connector 17 of the coaxial cable 16 to the connector 33 of the coaxial cable 34, and then fits the connection terminal 23 to the ground plate 41, and positions the positioning members 18a and 18b to the alignment holes 30a and 30b. Insert it into

  FIG. 7 is a schematic cross-sectional view showing an example of a structure for attaching the vehicle antenna device 10 to the roof panel 50. About the same structure as Example 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted or simplified.

  Example 4 shows a case where the roof panel is a non-conductive member such as an acrylic resin. Since the roof panel 50 is a nonconductive member, the ground plate 31 is connected to a conductive member such as a vehicle body outer plate 51 such as a steel plate or a vehicle body frame via a ground wire 52. The back surface of the roof panel 50 and the ground plate 31 may be connected using an appropriate connection means such as a double-sided tape or an adhesive such as an adhesive. Further, the magnets 14a and 14b alone cannot be fixed in a state where the lower surface of the housing 15 is in contact with the roof panel 50, which is a non-conductive member. It attaches using suitable connection means, such as adhesive bodies. Thus, the roof panel 50 and the lower surface of the housing 15 are fixed in contact with each other by the attractive force generated by the magnetic force between the magnets 14a and 54a and the attractive force generated by the magnetic force between the magnets 14b and 54b.

  Therefore, according to the above-described embodiment, the worker can easily perform grounding together with the mounting of the vehicle antenna device from the outside of the vehicle. In the above-described embodiment, the attachment from the outside of the vehicle has been described as an example, but it is of course possible to remove the vehicle antenna device and its ground from the outside of the vehicle.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, the antenna element 11 is not limited to a monopole type, and can be replaced with an antenna element suitable as a vehicle antenna. In particular, the height from the roof panel can be suppressed by using a low-profile antenna such as a helical antenna, a T antenna, or an inverted F antenna.

  In the above-described embodiment, the vehicle antenna device is installed on the roof panel. However, the vehicle antenna device may be installed on an outer plate other than the roof panel. For example, you may install in a pillar part, a trunk part, and a bonnet part.

  In addition, the material such as the conductive spring 13, the conductive rubber 20, and the conductive sponge, such as the material, shape, elastic modulus, and conductivity, are electrically connected to the ground pattern on the vehicle board. It only needs to be suitable for connecting to the network.

  The conductive rubber 20 may be fixed in advance to the upper surface of the ground plate 31 instead of the component parts of the vehicle antenna device 10.

  Further, there may be a plurality of through holes 30c, and the conductive spring 13 and the coaxial cable 16 may be inserted through different through holes.

3 is a schematic cross-sectional view showing a first example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. FIG. It is the figure which showed the attachment method from the vehicle outside of the vehicle antenna apparatus. 5 is a schematic cross-sectional view showing a second example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. FIG. This is an embodiment of the conductive rubber 20. FIG. 6 is a schematic cross-sectional view showing a third example of a structure for attaching the vehicle antenna device 10 to the roof panel 30. 3 is an enlarged view of a fitting portion between a ground plate 41 and a connection terminal 23. FIG. It is the figure which showed the example of attachment structure to the roof panel 50 of the vehicle antenna apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle antenna apparatus 11 Antenna element 12 Circuit board 13 Conductive spring 14, 54 Magnet 15 Case 20 Conductive rubber 23 Connection terminal 30 Roof panel (conductive material)
31, 41 Ground plate 32 Roof trim (interior, lining)
50 Roof panel (non-conductive material)
51 Car body outer plate (conductive material)

Claims (9)

An antenna device disposed on the surface side of the outer plate of the vehicle;
A grounding member disposed on the back side of the outer plate;
A mounting structure for a vehicular antenna device, comprising: an elastic body that is provided in a penetrating direction of the through hole of the outer plate and is in contact with the antenna device and the ground member.   The vehicle antenna device mounting structure according to claim 1, wherein the elastic body electrically connects the circuit board to which the antenna element of the antenna device is connected and the ground member.   The vehicle antenna device mounting structure according to claim 1, wherein the elastic body is in contact with the ground member in the penetrating direction.   4. The vehicle antenna device mounting structure according to claim 1, wherein the ground member is a plate-like body having a contact surface with the elastic body. 5.   5. The vehicle antenna device mounting structure according to claim 1, wherein the ground member is electrically connected to a back surface of the outer plate. 6.   6. The vehicle antenna device mounting structure according to claim 1, wherein the ground member is disposed between the outer plate and a vehicle interior.   The vehicle antenna device mounting structure according to claim 1, wherein the outer plate is a roof panel.   The mounting structure for a vehicle antenna device according to any one of claims 1 to 7, further comprising fixing means for fixing the antenna device to the surface side by a magnetic force.   The vehicle antenna device mounting structure according to claim 1, wherein the opening of the through hole has a size that allows at least insertion of in-vehicle wiring connected to the antenna device.

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