JP2006121291A - Antenna connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely connect the element of a printed antenna stuck on the window glass of a vehicle with a transmitting/receiving circuit on the vehicle body side. <P>SOLUTION: A connector 24 is provided oppositely to a feeding point 18 of a part of an antenna element. A contact 34 is provided to the connector corresponding to each feeding point. The contact includes a contact plate 40 and a permanent magnet 42. The permanent magnet attracts the contact plate. The contact plate is magnetized by it. The contact plate and the feeding point are attracted by the magnetic force. Stable contact pressure can be obtained by the magnetic force. The contact plate is arranged with a play in a contact case 36 of the connector and can be moved by a prescribed amount in the case. The contact plate can be moved by the play corresponding to the curvature of a curved glass even if the glass 16 is the curved glass. Consequently, the contact pressure can be maintained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection structure between an element of a printed antenna and a circuit such as a transmission / reception circuit.

  2. Description of the Related Art A vehicle antenna device is known in which a predetermined pattern of a conductor is attached to a window glass at the rear of a vehicle and the antenna is used as an antenna element. An antenna device provided with such an antenna element is generally called a printed antenna. In order to connect such an element and a circuit such as a transmission / reception circuit provided on the vehicle body side, conventionally, a terminal joined to the element and a terminal connecting the circuit on the vehicle body are inserted and connected. It was. When the number of antenna elements increases, there is a problem that the connection work of the terminal with the vehicle body side circuit portion increases correspondingly, and the terminal portion becomes conspicuous.

  The following Patent Document 1 shows an antenna structure capable of simultaneously connecting a plurality of contacts when a window glass is attached. That is, a plurality of elastically supported power supply members are arranged on the vehicle body side, and when the glass is attached to the vehicle body, a part of the element (power supply point) provided on the glass contacts and connects with the power supply member. Is done.

JP 2003-347817 A

  However, in the case of the technique disclosed in the above publication, the contact pressure of the power supply member depends on the elastic force of the elastic member, and the contact pressure decreases when the stroke of the elastic member is small. For this reason, if the stroke of the elastic member cannot obtain the desired stroke due to a dimensional error of the part itself, an error during assembly, or the like, the contact pressure may be insufficient. In addition, when the window glass is a curved surface, if a plurality of power supply members are arranged on a flat surface, a power supply member having a large stroke of the elastic member and a small power supply member are mixed, and contact failure may occur. There was a problem of increased sex. Therefore, it is necessary to consider the arrangement of the power feeding member in accordance with the curvature of the window glass.

  The present invention provides an antenna connection structure that is advantageous in dealing with dimensional errors and window glass curvature.

  The antenna connection structure of the present invention includes a feeding point of two or more flat plate-like elements and a conduction plate that is connected to a transmission / reception circuit and is disposed opposite to the feeding point for each feeding point. A contact plate disposed between the feeding point and the conduction plate so that both ends thereof are connected to each other; a permanent magnet that is in close contact with the contact plate and connects the contact plate, the conduction plate, the contact plate, and the feeding point by magnetic force; A conductive plate, a contact plate, and a common contact case for storing permanent magnets provided for each feeding point are included, and the conductive plate and the contact plate are stored with play in the contact case.

  The curvature of the glass is absorbed by the play of the conductive plate and the contact plate in the contact case, while the contact plate is attracted to the conductive plate and the feeding point by the attractive force of the permanent magnet. Thereby, an appropriate contact pressure of the contact can be obtained regardless of the dimensional accuracy and the curvature of the glass.

  Moreover, when using as an antenna connection structure for vehicles, the said contact case can be supported with respect to a vehicle body via elastic members, such as a spring. Thereby, the displacement of the vehicle body and the glass that cannot be absorbed by play between the contact case and the contact plate can be absorbed, and the connection of the contacts can be reliably maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a rear appearance of a vehicle body type vehicle called a station wagon. The station wagon has an appearance in which a luggage compartment is connected to the rear of a space for passengers to ride, and the cargo compartment generally has window glasses on the left and right sides and the rear. There are cases where a so-called quarter window 10 or a rear window glass (rear window) on the side of the cargo compartment is equipped with a printed antenna having an antenna element 12 attached to the glass surface. A printed antenna requires a structure for connecting an antenna element attached to glass and a receiving circuit such as an antenna amplifier provided on the vehicle body side, that is, a power feeding structure. In the case of the vehicle shown in the figure, the circuit on the vehicle body side is disposed inside a pillar at the boundary between the cabin and the cargo compartment, so-called C pillar 14. The circuit may be provided in a vehicle body portion other than the C pillar 14 near the glass. Also, in the rear window, a circuit can be provided in the surrounding vehicle body. In the following description, a power supply structure for a printed antenna provided in a quarter window will be described. However, this power supply structure can also be applied to other windows in a vehicle and windows provided in windows other than the vehicle.

  FIG. 2 is a cross-sectional view showing a feeding structure of a printed antenna provided in the quarter window 10. The glass 16 of the quarter window 10 is fixed to the vehicle body by bonding or the like at the periphery. The antenna element 12 is affixed to the glass 16, and the feeding point 18 is shown in the figure. Three or more feed points 18 are arranged in series in a direction penetrating the paper surface of the drawing, and four in the present embodiment with a predetermined interval. In the figure, the left side of the glass 16 is inside the vehicle, the right side is outside the vehicle, and the top is the front of the vehicle. An interior member 20 of the C pillar 14 portion is located on the inner side of the glass 16, and an antenna amplifier 22 and a connector 24 for connecting the amplifier and the antenna element 12 are disposed therein.

  The antenna amplifier 22 includes a substrate 26 on which circuit elements are mounted and an amplifier circuit is formed, and an amplifier case 28 that houses the substrate. The amplifier case 28 is provided with a support portion 30 for supporting the connector 24, and the connector 24 is supported here via an elastic member, in this embodiment, a coil spring 32.

  The structure of the connector 24 is shown in FIGS. 3 shows a state viewed from the right in FIG. 2, FIG. 4 is a sectional view taken along line AA shown in FIG. 3, and FIG. 5 is a diagram showing a more detailed structure. As shown in FIGS. 3 and 4, the connector 24 is provided with four contact portions 34 corresponding to the four feeding points 18. FIG. 5 is a view showing a detailed structure of one of the contact groups 34.

  A rectangular opening 38 is provided on the front surface of the contact case 36 facing the glass 16, from which four contact plates 40 are arranged with their heads slightly protruding. . The four contact plates 40 have a substantially convex shape as shown in FIG. 5, and have a width at which the central high portion 40 a can protrude from the opening 38, and project to the left and right. The collar portion 40b protrudes laterally from the width of the opening 38, thereby preventing the contact plate 40 from protruding from the opening 38 and spilling out of the contact case 36. A permanent magnet 42 is disposed between each of the four contact plates 40. The contact plate 40 and the antenna element 12 are made of a paramagnetic material. The contact plate 40 is directly adsorbed by the magnetic force of the permanent magnet 42, and the magnetized contact plate 40 and the feeding point 18 that is a part of the antenna element are also adsorbed. .

  The back surface side of the contact plate 40, that is, the opposite end of the glass 16 is regulated by a bottom lid 44 fitted into the contact case 36, whereby the collar portion 40 b of the contact plate 40 has the contact case 36 and the bottom lid 44. Held between. As shown in FIG. 5, the distance between the front surface of the contact case 36 and the bottom cover 44 fitted thereto is wider than the collar portion 40b, whereby the collar portion 40b is held in the contact case 36 with play a. . A groove is provided on the surface of the bottom lid 44 that contacts the contact plate 40, and a conduction plate 46 is disposed in the groove. The conduction plate 46 is also made of a paramagnetic material and is attracted to the magnetized contact plate 40. As shown in FIG. 2, a part of the conductive plate 46 protrudes from the side surface of the contact case 36, and a lead wire 48 connected to the circuit of the substrate 26 is connected to this part.

  As a result, the antenna element 12 is connected to the receiving circuit on the vehicle body side by the feeding point 18, the contact plate 40, the conduction plate 46 and the lead wire 48.

  The coil spring 32 is accommodated in a receiving hole 50 provided in the contact case 36, and one end is fixed to the bottom of the receiving hole 50. The accommodation hole 50 opens to the back side of the contact case 36, and one end of the coil spring 32 protrudes from the opening and is fixed to the support portion 30. The amount by which the coil spring 32 protrudes is enough to allow the connector 24 to move toward the support portion 30.

  In the vehicle assembly operation, first, the amplifier case 28 and the connector 24 are fixed in the C pillar 14. As described above, the connector 24 is supported by the amplifier case 28 via a spring. In this state, the glass 16 is bonded and fixed at a predetermined position. In FIG. 2, mounting is performed from the right direction. At this time, the feeding point 18 comes into contact with the corresponding contact portion 34 of the connector 24, and further the entire connector 24 is pushed slightly toward the support portion 30. The feeding point 18 and the contact plate 40 of the contact part 34 are attracted by magnetic force.

  By simply fixing the glass 16 in this manner, the antenna element 12 and the antenna amplifier 22 can be connected, and the assembling work can be simplified. Further, the error in the mounting position of the glass 16 and the amplifier case 28 is absorbed by the deflection of the coil spring 32, while the contact plate 40 and the feeding point 18 are attracted by magnetic force, so that a stable attracting force can be obtained. . In other words, since the contact pressure between the contact plate 40 and the feeding point 18 is not obtained as a reaction force corresponding to the amount of deflection of the coil spring 32 when the glass 16 is fixed, the contact pressure is affected by the mounting error. Absent. In addition, the inclination at the time of attaching the glass 16 and the amplifier case 28 and the displacement due to the vibration while the vehicle is traveling are also absorbed by the coil spring 32.

  Further, as described above, since the contact plate 40 is held with play a in the contact case, even if the glass 16 is a curved glass, the protruding amount of the contact plate 40 in each contact portion 34 is different. This can be dealt with well. Further, in the individual contact portions 34, the contact plate 40 is inclined with respect to the contact case 36, so that it is possible to cope with the inclination by the curved glass. Also in these cases, the attractive force between the contact plate 40 and the feeding point 18 in each contact portion 34 is due to magnetic force, and a stable force can be obtained. Further, even when a common contact case is used for glasses having different curvatures, a difference in curvature can be allowed to some extent.

It is a figure which shows the external appearance of the rear part of a vehicle, especially a station wagon. It is sectional drawing which shows the electric power feeding structure of the antenna of this embodiment. It is a figure which shows the external appearance of the connector 24. FIG. It is sectional drawing by the AA line of FIG. 4 is a cross-sectional view showing details of a contact portion 34. FIG.

Explanation of symbols

12 antenna element, 16 glass, 18 feeding point, 22 antenna amplifier, 24 connector, 28 amplifier case, 30 support part, 32 coil spring, 34 contact part, 36 contact case, 40 contact plate, 42 permanent magnet, 46 conducting plate .

Claims (5)

An antenna connection structure for connecting a printed antenna element and a transmission / reception circuit,
A feeding point of two or more flat plate-shaped elements;
A conduction plate connected to the transmission / reception circuit and disposed opposite to each of the feeding points;
Between the feeding point and the conduction plate, a contact plate arranged so that both ends are connected to these,
A permanent magnet that adheres closely to the contact plate and connects the contact plate and the conduction plate and the contact plate and the feeding point by magnetic force;
A common contact case for storing a conduction plate, a contact plate and a permanent magnet provided for each feeding point;
Have
The conduction plate and the contact plate are stored with play in the contact case.
Antenna connection structure.   The antenna connection structure according to claim 1, wherein the contact case is supported by a support base via an elastic member. An antenna connection structure that connects an element of a printed antenna affixed to a window glass fixed to a vehicle body and a circuit on the vehicle body side,
A feeding point of two or more flat plate-shaped elements;
A conduction plate connected to the transmission / reception circuit and disposed opposite to each of the feeding points;
Between the feeding point and the conduction plate, a contact plate arranged so that both ends are connected to these,
A permanent magnet that adheres closely to the contact plate and connects the contact plate and the conduction plate and the contact plate and the feeding point by magnetic force;
A common contact case for holding a conduction plate, a contact plate and a permanent magnet provided for each feeding point with play;
An antenna connection structure.   The antenna connection structure according to claim 3, further comprising a support base that is fixed to the vehicle body side and supports the contact case via an elastic member. An antenna connector for connecting two or more plate-shaped feeding points of a printed antenna element affixed to a window glass fixed to a vehicle body and a circuit on the vehicle body side;
A conduction plate connected to the transmission / reception circuit and arranged for each of the feeding points facing the feeding point;
Between the feeding point and the conduction plate, a contact plate arranged so that both ends are connected to these,
A permanent magnet that is in close contact with the contact plate and brings the contact plate and the conduction plate and the contact plate and the feeding point into contact by magnetic force;
A common contact case for holding a conduction plate, a contact plate and a permanent magnet provided for each feeding point with play;
Having an antenna connector.

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