JP4281640B2 - Laminated glass wire connection structure and antenna device - Google Patents

Description

  The present invention relates to an electric wire connection structure for laminated glass in which an enclosed electric wire enclosed in a laminated glass and an external electric wire provided on the surface side of the laminated glass are connected through capacitive coupling.

Conventionally, in a laminated glass in which a plurality of glass plates are bonded via an intermediate film, an antenna wire and an electrode connected to one end of the antenna wire are enclosed between the gas plate and the glass plate, and the enclosed electrode ( Hereinafter, the electrodes received on the antenna wire are opposed to each other by facing an external electric wire side electrode (hereinafter referred to as “external electrode”) provided on the surface of the laminated glass. There is known a technique of taking out to the side of the external electric wire via a capacitance between them (for example, see Patent Documents 1, 2, and 3). In contrast to the electric wire connection structure in which the antenna wire is directly connected to the external electric wire provided on the surface side of the laminated glass, the electric wire connecting structure through the capacitive coupling is drawn out from the end surface of the laminated glass. There is no need, and there is no need to form a notch in the laminated glass for exposing the antenna wire side electrode to the outside. For this reason, the special process (for example, rust prevention process of an end surface) with respect to a laminated glass becomes unnecessary, and the strength reduction of the laminated glass by a notch can also be prevented.
Japanese Patent Laid-Open No. 2-82701 Japanese Patent Laid-Open No. 61-30102 Japanese Utility Model Publication No. 5-43608

  By the way, in the electric wire connection structure by the above-mentioned prior art, an external electrode is formed on the surface of the laminated glass with a conductor paste (Ag or the like), and the end of the external electric wire (or the outside) is formed on the external electrode on the surface of the laminated glass. The connector fitting that accepts the terminal of the wire is soldered. However, this soldering operation must be performed on the surface of the laminated glass because the external electrodes are fixed on the surface of the laminated glass. For this reason, in such a wire connection structure, thermal stress is generated in the glass plate of the laminated glass due to the heat generated during soldering, and there is a concern that the quality of the laminated glass is degraded.

  Furthermore, since solder used for window glass for automobiles usually contains lead, it takes time to dispose of the solder containing lead at the time of disposal. Also, the ELV (Discarded Vehicle) Directive in Europe and the WHEE & RoHS ( Regulations on the use of solder containing lead are being studied in various countries, such as the Waste Electrical and Electronic Equipment (Directive), and it is becoming impossible to use solder containing lead. In addition, when the external electrode is formed of a conductive paste, two printing steps are required together with the formation of the antenna wire side (encapsulated electrode), leading to a problem of increased costs.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention has an object to provide a laminated glass wire connection structure that secures capacitive coupling while eliminating the need for soldering work on laminated glass.

In order to solve the above problems, according to one embodiment of the present invention,
In the laminated glass wire connection structure for electrically connecting the enclosed electric wire enclosed in the laminated glass and the external electric wire provided on the surface side of the laminated glass,
An encapsulated electrode enclosed in a laminated glass and connected to the encapsulated wire;
An external electrode connected to the external wire and facing the encapsulated electrode so as to be capacitively coupled to the encapsulated electrode;
An electrode holding member that is provided at an end of the external electric wire and holds a plurality of external electrodes respectively opposed to the plurality of encapsulated electrodes ;
There is provided a laminated glass electric wire connection structure comprising: a receiving member that is bonded and fixed to a surface of a laminated glass and on which the electrode holding member is detachably mounted.

In this case, the electrode holding member may be one that holds the two external electrodes respectively facing the two enclosed electrodes. The enclosed electric wire may be an antenna wire.

In addition, the external electrode and the encapsulated electrode may be different in the size of the facing surface. Furthermore, you may provide the member which adjusts a dielectric constant between the said external electrode and the said sealing electrode.

  In the present invention, an electrode holding member that holds an external electrode is attached to a receiving member that is bonded and fixed to the surface of the laminated glass, so that the external electrode faces the encapsulated electrode enclosed between the glass plates of the laminated glass. Capacitive coupling eliminates the need for soldering to connect external wires to the external electrodes on the surface of the laminated glass, which is not only desirable from the viewpoint of environmental considerations, but also reduces the strength of glass plates due to thermal stress. Can be prevented.

  Further, when the electrode holding member holds a plurality of external electrodes respectively facing the plurality of encapsulated electrodes, the plurality of encapsulated electric wires in the laminated glass and the plurality of external electric wires on the surface side of the laminated glass are simultaneously and efficiently Can be connected.

  Moreover, since it is not necessary to form an external electrode with a conductor paste, the processing man-hour of a laminated glass can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing a configuration of a main part of a laminated glass used for a front windshield of an automobile in an electric wire connection structure according to the present invention, and FIG. 2 is an enlarged perspective view of a portion X in FIG. The laminated glass 10 is obtained by press-bonding a plurality of glass plates 12 (in this example, two glass plates 12a and 12b) via an intermediate film 14 between them. The intermediate film 14 is made of, for example, polyvinyl butyral (PVB). In addition, although the laminated glass 10 is normally used as a front windshield of a motor vehicle, it may be used as a side glass or a rear glass of a motor vehicle.

  An antenna wire 20 is enclosed in the laminated glass 10. The antenna wire 20 may be formed of a conductive wire (for example, a copper antenna wire) or a conductive film, and may be enclosed in the laminated glass 10 by any method. For example, the antenna wire 20 is formed by embedding an electric wire in the intermediate film 14, or by inserting a film on which the antenna pattern is printed, between the intermediate film 14 and the glass plate 12, or the antenna pattern is made of glass. It may be enclosed in the laminated glass 10 by printing on the inner surface of the plate 12. The antenna line 20 may be used to transmit and receive any digital signal or analog signal. For example, the antenna line 20 receives radio waves from a television station or radio station, radio waves from a mobile phone, or radio waves from a satellite. It may be.

  The antenna wire 20 has an electrode 22 (hereinafter referred to as “encapsulated electrode 22”) sealed between the glass plates 12a and 12b of the laminated glass 10 at its end. The encapsulated electrode 22 may be set at the peripheral edge of the laminated glass 10. The size and shape of the encapsulated electrode 22 are determined according to the application of the antenna line 20, similarly to the length of the antenna line 20. The encapsulated electrode 22 may be formed integrally with the antenna wire 20.

  3 (A) and 3 (B) are perspective views from two directions showing a main configuration of the external electric wire 40 side in the electric wire connection structure according to the present invention.

  One end of the external electric wire 40 is connected to a predetermined media device (not shown) (for example, an information receiving device such as an audio device including a television and a radio, a navigation device, an information terminal including a mobile phone). The other end of the external electric wire 40 is connected to an electrode (hereinafter referred to as “external electrode 42”) that is capacitively coupled to the encapsulated electrode 22 of the antenna wire 20 as described later (see FIG. 5).

  The external electrode 42 is held by an electrode holding member 50 provided at the end of the external electric wire 40. The electrode holding member 50 is formed of an insulating material such as resin. The external electrode 42 is exposed to the outside of the electrode holding member 50 as shown in FIG. The external electrode 42 is held by the electrode holding member 50 by mechanical engagement or adhesion.

  The electrode holding member 50 has an internal space 51 (see FIG. 5) that houses the end of the external electric wire 40. For example, the electrode holding member 50 may be formed of two parts or formed to be openable and closable so that the end of the external electric wire 40 can be received in the internal space 51 (see FIG. 7). A conductor end 41 (see FIG. 5) of the external electric wire 40 is connected to a connection part 42 a extending in the internal space 51 of the external electrode 42 in the internal space 51 of the electrode holding member 50. The conductor end 41 of the external electric wire 40 may be directly attached to the connection part 42a of the external electrode 42 by solder. Alternatively, mechanical means such as caulking may be used to realize a contact state between the conductor end 41 of the external electric wire 40 and the connection portion 42a of the external electrode 42.

  The electrode holding member 50 is mounted and held on the receiving member 52. The receiving member 52 is formed of an insulating material such as resin. The electrode holding member 50 and the receiving member 52 may be detachably connected via a snap-type insertion or fitting, like a general connector. In the example shown in FIG. 3, the electrode holding member 50 is inserted in the insertion portion 57 of the receiving member 52 in the horizontal direction (the direction along the surface of the laminated glass 10), and the protruding portion 55 on the electrode holding member 50 side is the receiving member. It is engaged with the groove 56 on the 52 side. Thereby, the displacement in the insertion direction with respect to the receiving member 52 of the electrode holding member 50 at the time of mounting | wearing is restrained. Similarly, the vertical / horizontal displacement of the electrode holding member 50 at the time of mounting is restrained by the vertical / horizontal walls of the insertion portion 57 of the receiving member 52. As a result, the receiving member 52 can hold the electrode holding member 50 in a substantially undisplaceable state. In addition, the receiving member 52 has the opening part 53, and the exposure to the exterior of the receiving member of the external electrode 42 of the electrode holding member 50 is ensured also in the state which received the electrode holding member 50 (refer FIG. 5). The opening 53 is set on the lower surface of the receiving member 52 (the surface on the side facing the laminated glass 10).

  FIG. 4 is a perspective view showing the receiving member 52 provided on the laminated glass 10, and the receiving member 52 is shown with the electrode holding member 50 attached thereto. FIG. 5 shows a ZZ cross section of FIG.

  As shown in FIG. 5, the receiving member 52 is fixed to the surface of the laminated glass 10 via an adhesive portion 54. For this bonding, for example, a thermoplastic adhesive or a double-sided tape may be used. Typically, the receiving member 52 is incorporated in the vehicle body together with the laminated glass 10 in a state of being fixed to the laminated glass 10, and then the electrode holding member 50 is attached to the receiving member 52 together with the external electric wire 40. Become. However, the receiving member 52 may be fixed to the laminated glass 10 after the laminated glass 10 is incorporated into the vehicle body.

  In a state where the electrode holding member 50 is mounted on the receiving member 52 fixed to the laminated glass 10 (mounted state), the external electrode 42 of the electrode holding member 50 is an encapsulated electrode in the laminated glass 10 as shown in FIG. 22 is opposed. Thereby, the connection via the capacitive coupling of the external electric wire 40 and the antenna wire 20 is implement | achieved. During antenna operation, radio waves received by the antenna wire 20 are taken out through capacitive coupling between the external electrode 42 and the encapsulated electrode 22, subjected to predetermined processing (amplification processing, etc.) as necessary, and the external electric wire 40. To a predetermined media device.

  As described above, since the present embodiment is configured to hold the external electrode 42 on the electrode holding member 50, the laminated glass is compared with the conventional configuration in which the external electrode is directly fixed (printed) on the glass surface. The processing steps for 10 can be reduced. Further, in the mounted state shown in FIG. 5, the external electrode 42 of the present embodiment is preferably in close contact with the surface of the glass plate 12 from the viewpoint of stabilizing the dielectric constant, but is not printed on the surface of the glass plate 12. Therefore, a slight relative displacement between the external electrode 42 and the surface of the glass plate 12 is allowed. For this reason, in this embodiment, the glass plate 12 after the baking treatment is caused by the disadvantage that occurs in the conventional configuration in which the external electrode is printed on the glass surface, that is, the difference in the heat shrinkage rate between the glass and the metal that adhere to each other. The inconvenience that local stress is generated (and the accompanying strength reduction of the laminated glass 10) can be prevented.

  In this embodiment, the electrode holding member 50 that holds the external electrode 42 is set at the end of the external electric wire 40, and the receiving member 52 to which the electrode holding member 50 is attached is bonded and fixed to the laminated glass 10. For this reason, in this embodiment, the external electric wire 40 and the antenna wire 20 can be connected via capacitive coupling without soldering the external electric wire 40 to the external electrode 42 on the laminated glass 10. As a result, it is possible to prevent inconvenience that thermal stress is generated in the glass plate 12 due to heat generated during soldering.

  Further, in this embodiment, the external electrode 42 of the electrode holding member 50 is sealed in the laminated glass 10 only by mounting the electrode holding member 50 drawn from the vehicle body side to the receiving member 52 fixed to the laminated glass 10. Since it is reliably held at a position facing 22, the assembling property is good.

  In this embodiment, as shown in each drawing, one electrode holding member 50 holds two external electrodes 42 facing the two encapsulated electrodes 22 in the laminated glass 10. Therefore, it is possible to take out received radio waves from the two antenna wires 20 by attaching one electrode holding member 50 to the receiving member 52. Thereby, an efficient electric wire connection structure is realizable also to the structure which arrange | positions many antenna wires 20 in the one laminated glass 10. FIG. The plurality of antenna lines 20 may include different types of antennas (for example, antennas for receiving AM and FM broadcasts), or for diversity reception (reception method for selecting an antenna having the maximum sensitivity and / or the minimum error rate). The same type of antenna may be included.

  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, in the embodiment described above, as shown in FIG. 5, the encapsulated electrode 22 is provided between the intermediate film 14 and the glass plate 12a on the vehicle interior side. However, as shown in FIG. And a glass plate 12b outside the vehicle. Further, some of the plurality of encapsulated electrodes 22 may be provided between the intermediate film 14 and the glass plate 12a on the vehicle inner side, and the others may be provided between the intermediate film 14 and the glass plate 12b on the vehicle outer side. .

  In the embodiment described above, in order to adjust the dielectric constant of the capacitance (capacitor) formed between the external electrode 42 and the encapsulated electrode 22, a predetermined amount is provided between the external electrode 42 and the surface of the glass plate 12. A member having a dielectric constant may be interposed.

  Further, the intermediate film 14 is not necessarily a single layer, and a plurality of layers may exist between the two glass plates 12. The intermediate film 14 may have other functions such as a sound insulation function and a heat ray reflection function.

  In the above-described embodiment, various ways of holding the external electric wire 40 and the external electrode 42 by the electrode holding member 50 can be considered. For example, in the case of the electrode holding member 50 that can be opened and closed as shown in FIG. 7, the external electric wire 40 and the external electrode 42 are set in a predetermined position in the internal space 51 of the opened electrode holding member 50 in a state of being connected to each other. Then, the electrode holding member 50 is closed. At this time, the connecting portion 42a of the external electrode 42 and the covering portion 40a of the external electric wire 40 are fitted into the groove 58 and the inlet hole 59 (see FIG. 5) of the electrode holding member 50, and the external electrode 42 and the external electric wire 40 are held by the electrode. The member 50 is securely held. In this case, the external electric wire 40 and the external electrode 42 can be mechanically held by the electrode holding member 50.

  Moreover, although the Example mentioned above was related to the antenna wire 20, this invention is applicable also to the heat wire (heater wire) for anti-fogging or snow melting supplied with AC power supply. Further, a heat wire may be used as the antenna wire 20.

  In the above-described embodiment, the other end (end portion on the media device side) of the external electric wire 40 whose one end is connected to the electrode holding member 50 may be directly connected to the media device in the vehicle, or the media device. You may connect to the connector pulled out from. Alternatively, the other end (end on the media device side) of the external electric wire 40 may be connected to a Bluetooth transmitter or a wireless LAN transmitter, and transmission to the media device may be realized by in-vehicle wireless communication.

  Further, in the above-described embodiment, the external electrode 42 and the encapsulated electrode 22 in the laminated glass 10 do not necessarily have the same size and face each other so that a desired capacitance coupling is ensured. As long as they face each other in a predetermined area, they may have different sizes or partially face each other.

  In the embodiment described above, the receiving member 52 may be eliminated and the electrode holding member 50 may be directly fixed to the surface of the glass plate 12.

  In the above-described embodiments, the external electric wire 40 may be a single wire or a coaxial wire (coaxial cable), or may be a bundle of a plurality of single wires and / or coaxial wires. When the external electric wire 40 is a coaxial wire, the core wire of the coaxial wire is connected to the external electrode 42 as described above, and the shield wire (external conductor) of the coaxial wire is connected to the ground pattern on the laminated glass 10 side. At this time, the shield wire of the coaxial line may be connected to the second external electrode that is capacitively coupled to the ground pattern in the laminated glass 10 in the same manner as the core wire of the coaxial line. In this case, the second external electrode may be held by the electrode holding member 50 in the same manner as the external electrode 42 described above.

  In the embodiment described above, the electrode holding member 50 is detachably connected to the receiving member 52 in order to ensure the detachability of the electrode holding member 50. However, the electrode holding member 50 is connected to the receiving member 52. It may be fixed to 52 by, for example, a screw or an adhesive. Moreover, the electrode holding member 50 may be mechanically engaged with the receiving member 52 in any manner other than the above-described insertion, such as fitting or engagement with a claw.

  In the embodiment described above, the external electrode 42 may be slightly separated from the surface of the glass plate 12. That is, the external electrode 42 and the surface of the glass plate 12 may be non-contact.

It is a top view which shows the principal part structure by the side of the laminated glass in the electric wire connection structure by this invention. It is an expansion perspective view of the X section of FIG. It is a perspective view from 2 directions which shows the non-mounting state of the electrode holding member 50 and the receiving member 52 by this invention. 2 is a perspective view showing a receiving member 52 provided on a laminated glass 10. FIG. It is sectional drawing which shows the ZZ cross section of FIG. FIG. 5 is a sectional view of an alternative embodiment corresponding to the ZZ section of FIG. 4. It is a perspective view which shows one Example of the electrode holding member 50 (single body).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Laminated glass 12a, 12b Glass plate 14 Intermediate film 20 Antenna wire 22 Encapsulated electrode 40 External electric wire 42 External electrode
50 Electrode holding member 52 Receiving member 53 Opening portion 54 Adhesive portion

Claims (7)

In the laminated glass wire connection structure for electrically connecting the enclosed electric wire enclosed in the laminated glass and the external electric wire provided on the surface side of the laminated glass,
An encapsulated electrode enclosed in a laminated glass and connected to the encapsulated wire;
An external electrode connected to the external wire and facing the encapsulated electrode so as to be capacitively coupled to the encapsulated electrode;
An electrode holding member that is provided at an end of the external electric wire and holds a plurality of external electrodes respectively opposed to the plurality of encapsulated electrodes ;
A laminated glass wire connection structure, comprising: a receiving member that is bonded and fixed to a surface of a laminated glass and on which the electrode holding member is detachably mounted. The said electrode holding member is an electric wire connection structure of the laminated glass of Claim 1 hold | maintained two external electrodes which respectively oppose two enclosure electrodes. The wire connection structure for laminated glass according to claim 1 or 2, wherein the external electrode and the encapsulated electrode are partially opposed to ensure a desired capacitance coupling . The electric wire connection structure of laminated glass according to any one of claims 1 to 3, wherein the external electrode and the encapsulated electrode have different sizes of opposing surfaces . The wire connection structure for laminated glass according to any one of claims 1 to 4, further comprising a member for adjusting a dielectric constant between the external electrode and the encapsulated electrode . The sealed cable is an antenna wire, the electric wire connection structure of the laminated glass according to any one of claims 1-5. A radio wave signal received by the antenna wire and taken out via the capacitive coupling is provided to a predetermined information receiving device via the external wire, comprising the laminated glass wire connecting structure according to claim 6. An antenna device characterized by the above.

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