JP2020061277A - Vehicular window glass with terminal - Google Patents

Abstract

To provide a vehicular window glass with a terminal in which a crack hardly occurs in a lead-free solder or a glass and a terminal itself is hardly damaged even if an outer force is applied to the terminal.SOLUTION: A vehicular window glass with a terminal, comprises: a coupling part having a first side, a second side adjacent to the first side, a third side opposite to the first side, and a fourth side opposite to the second side; a first leg part and a first pedestal base connected to the second side; a second leg part and a second pedestal base connected to the fourth side; an extension part extended from a center of the third side; and a fastening part provided at a tip of the extension part. The first and second pedestal bases are provided so as to project from a virtual extension line of the third side, and the fastening part is provided at a position separated from the tips of the first and second pedestal bases.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle window glass with a terminal.

  In a window glass for a vehicle, a conductive layer made of a conductive material is provided on a glass surface, for example, as a defogger for preventing fogging and as an antenna for radio, television, and wireless communication. In the case of a defogger for preventing fogging, a heater pattern or a bus bar is formed on a glass surface by baking a silver paste or the like. In the case of an antenna, a pattern corresponding to various applications such as compatibility with AM, FM, terrestrial broadcasting, and satellite broadcasting is similarly formed on the glass surface by baking silver paste or the like. The conductive layer that needs to exchange power and signals is connected at its end to a power supply circuit and a signal processing circuit by terminals.

  In Patent Document 1, a part of the inner glass of the laminated glass is cut out to expose a conductive layer provided on the inner surface side of the outer glass, and a power supply terminal is connected to the exposed conductive layer. A laminated glass is disclosed.

JP, 2016-199128, A

  Conventionally, the conductive layer is connected to the terminal connected to the circuit by leaded solder. Since leaded solder has an excellent adhesive function and high plastic deformability, residual stress during soldering is easily relieved. Therefore, the terminal could be easily connected to the conductive layer on the glass surface by the leaded solder. On the other hand, in recent years, the influence of lead on the human body and the environment has been pointed out, and it is considered preferable to use lead-free solder for vehicle window glass applications.

However, lead-free solder has a higher Young's modulus and rigidity than lead-containing solder. For this reason, when the conductive layer and the terminal of Patent Document 1 are connected by lead-free solder, the legs of the terminal are longer than the thickness of the glass inside the vehicle. Therefore, when external force is applied to the terminal, the lead-free solder and the glass are likely to crack. Not only that, but the terminal itself may be damaged. An object of the present invention is to provide a technique for solving the above problems.

In order to solve the above problems, the vehicle window glass with a terminal of the present invention,
A window glass for a vehicle with a terminal, comprising a glass plate, a conductive layer formed on at least one main surface of the glass plate, and a terminal joined to the conductive layer by a solder layer,
The terminals are
The first side, the second side adjacent to the first side, the third side facing the first side, and the fourth side facing the second side are rectangular in plan view. A connecting portion provided,
A first leg connected to the second side; a first pedestal extending from the first leg and connected to the conductive layer by the solder layer;
A second leg connected to the fourth side; a second pedestal extending from the second leg and connected to the conductive layer by the solder layer;
An extending portion extending from the center of the third side so as to be parallel to the main surface of the glass plate, and a caulking portion provided at a tip of the extending portion,
Equipped with
An angle at which the first side and the second side intersect is a first angle, an angle at which the second side and the third side intersect is a second angle, and the first to second If the direction toward the corner is the first direction,
The first pedestal and the second pedestal are provided so as to project in the first direction from a virtual extension line of the third side,
The caulking portion is provided at a position further away in the first direction than the tips of the first and second pedestals in the first direction.

  According to the present invention, in the terminal to be joined by the lead-free solder and the conductive layer formed on the main surface of the vehicle window glass, even if an external force is applied to the terminal, the lead-free solder or the glass is less likely to crack, and, It is possible to provide a window glass for a vehicle with a terminal in which the terminal itself is not easily damaged.

It is a front view of the window glass for vehicles with a terminal concerning a 1st embodiment of the present invention. It is a perspective view of the terminal shown in FIG. It is a top view of the terminal shown in FIG. It is a front view of the terminal shown in FIG. It is a front view which shows the operation | movement which is bending the crimp part of the terminal shown in FIG. It is a front view which shows the operation | movement which is bending the crimp part of the terminal shown in FIG. It is a top view of the state which expanded the crimping part of the terminal shown in FIG.

  Embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the constituent elements described in the following embodiments are merely examples, and the technical scope of the present invention is not intended to be limited thereto. The window glass for a vehicle with a terminal of the present invention is used as, for example, a rear glass or a windshield, but is not limited to this. When the vehicle-mounted window glass with terminals shown in FIG. 1 is incorporated in a vehicle, the lower side in the figure is the outside of the vehicle and the upper side is the inside of the vehicle.

  As shown in FIG. 1, a vehicle window glass 100 with a terminal according to an embodiment of the present invention includes a conductive layer 20 formed on at least one main surface of a glass plate 10 and a terminal connected to the conductive layer 20. Have 30.

  As the glass plate 10, for example, soda lime glass, borosilicate glass, non-alkali glass, quartz glass or the like is used without particular limitation. Of these, soda lime glass is particularly preferable. The glass plate 10 may be untempered glass or tempered glass. The unstrengthened glass is formed by shaping molten glass into a plate shape and gradually cooling it. The tempered glass is formed by forming a compressive stress layer on the surface of untempered glass. The tempered glass may be either physically tempered glass (for example, air-cooled tempered glass) or chemically tempered glass. In the case of a physically strengthened glass, a glass plate that has been uniformly heated is rapidly cooled from a temperature near the softening point, and a compressive stress is generated on the glass surface due to the temperature difference between the glass surface and the inside of the glass to strengthen the glass surface. May be. In the case of chemically strengthened glass, the glass surface may be strengthened by producing compressive stress on the glass surface by an ion exchange method or the like. Further, the glass plate 10 is preferably transparent, but may be a glass plate colored so as not to impair transparency. The plate thickness of the glass plate 10 is not particularly limited, but is preferably 0.5 mm or more and 5.0 mm or less.

  When the window glass 100 for a vehicle with a terminal is attached to an automobile, the glass plate 10 has an outside glass plate located on the outside of the vehicle and an inside glass plate located on the inside of the vehicle bonded to each other via an intermediate film. It may be laminated glass. As the interlayer film, in addition to the interlayer film made of polyvinyl butyral (PVB), ethylene vinyl acetate copolymer (EVA) can be preferably used when water resistance is particularly required. A type prepolymer, an acrylic catalyst polymerization type prepolymer, a photopolymerization type prepolymer of acrylic acid ester / vinyl acetate, polyvinyl chloride and the like can also be used. The outside glass plate and the inside glass plate may have the same composition, shape, and thickness, or may have different compositions.

The glass plate 10 has a conductive layer 20 formed on its main surface. The conductive layer 20 is formed by, for example, printing and applying a conductive silver paste on the main surface of the glass plate 10 and then firing the paste. The conductive silver paste is preferably a material having an electric resistivity of 0.5 to 9.0 × 10 ⁻⁸ Ω · m after being formed. The thickness of the conductive layer 20 is preferably 3 μm or more and 15 μm or less. More preferably, it is 3 μm or more and 10 μm or less. When the glass plate 10 is used as the rear glass, the bus bars 21 are formed by the conductive layers 20 on both sides of the glass plate 10, and the electric heating means 22 is formed between the bus bars 21. The terminals 30 are electrically connected to the bus bars 21, respectively. The electric heating means 22 has a function of removing current such as frost or ice adhered to the glass plate 10 when an electric current is supplied to the terminal 30 from the outside, a current flows through the electric heating means 22 to generate heat. As shown in FIG. 1, the electric heating means 22 may have a linear shape, a bent portion or a curved shape, or a mesh shape. Further, the electric heating means 22 may be a transparent conductive film. The transparent conductive film may be composed of, for example, a metal film such as an Ag film, a metal oxide film such as an ITO (indium tin oxide) film, or a resin film containing conductive fine particles. The transparent conductive film may be a stack of plural kinds of films.

  Between the main surface of the glass plate 10 and the conductive layer 20 (bus bar 21), a dark opaque shielding layer (dark color ceramic layer) such as black formed in a strip shape along the peripheral edge of the glass plate 10 is provided. May be. The shielding layer has a function of protecting a urethane sealant or the like that adheres and holds the glass plate 10 to the vehicle body of an automobile from deterioration caused by ultraviolet rays, and when the window glass 100 for a vehicle with terminals is attached to the automobile, the bus bar 21 and the terminals 30. Has a function of concealing the vehicle from the outside of the vehicle. The shielding layer is formed by applying a ceramic paste on the main surface of the glass plate 10 and then firing it. The thickness of the shielding layer is preferably 3 μm or more and 30 μm or less. More preferably, it is 3 μm or more and 20 μm or less. Although the width of the shielding layer is not particularly limited, it is preferably 20 mm or more and 300 mm or less.

  The terminal 30 is arranged near the end of the outer peripheral edge of the glass plate 10. Further, the terminal 30 is arranged on the side surface inside the vehicle when the glass plate 10 is attached to the vehicle. When the glass plate 10 is laminated glass, the glass plate 10 may be arranged on the inside surface of the glass plate inside the vehicle. Alternatively, a part of the glass on the inside of the vehicle may be cut away to expose the conductive layer formed on the inside surface of the glass plate on the outside of the vehicle, and the glass may be arranged on the exposed conductive layer.

  As shown in FIG. 2, the terminal 30 includes a connecting portion 31, a first leg portion 32 and a first pedestal 34, a second leg portion 33 and a second pedestal 35, an extending portion 36, and a caulking portion 37. The first pedestal 34 and the second pedestal 35 are electrically connected to the conductive layer 20 formed on the main surface of the glass plate 10 by the solder layer 40.

  The solder layer 40 connecting the conductive layer 20 and the first pedestal 34 and the second pedestal 35 of the terminal 30 is preferably lead-free solder. The lead-free solder is not particularly limited, but Sn-Ag solder, Sn-Zn solder, Sn-Sb solder, Sn-Ag-In solder, Sn-Zn-Bi solder, Sn-Ag-Al-Zn. Examples thereof include system C solder, Sn-Zn-Ti system solder, Sn-Al-In-Ag-Cu-Zn system solder, and Sn-Ag-Cu system solder.

  The terminal 30 is obtained by punching (pressing) and bending (bending) a metal plate. The surface of the terminal 30 may be subjected to surface treatment (tin plating or the like) as necessary. The thickness of the metal plate forming the terminal 30 is preferably 0.3 mm or more and 1.0 mm or less. If the thickness of the metal plate is 0.3 mm or more, the strength of the terminal itself will be sufficient. When the plate thickness of the metal plate is 1.0 mm or less, bending work such as bending or crimping the metal plate is facilitated, which is preferable.

  The material of the terminal 30 is preferably an alloy containing iron, chromium and / or nickel. If the material of the terminal 30 is an alloy containing iron, chromium and / or nickel, the difference in the coefficient of thermal expansion from the glass plate 10 will be small, so even if lead-free solder is used as the solder layer 40, a vehicle with a terminal Even when the window glass 100 for use has a high temperature or a low temperature, since the difference in the coefficient of thermal expansion between the glass plate 10 and the terminal 30 is small, the glass plate 10 is less likely to crack and the terminal 30 Is less likely to be damaged, which is preferable.

  As shown in FIG. 3, the connecting portion 31 has a rectangular shape in a plan view and includes a first side 311, a second side 312 adjacent to the first side, and a third side 313 facing the first side. The second side 312 and the fourth side 314 facing the second side 312 are provided. The first leg portion 32 is connected to the second side 312 of the connecting portion 31. A first pedestal 34 extends from the first leg portion 32. The second leg portion 33 is connected to the fourth side 314 of the connecting portion 31. A second pedestal 35 extends from the second leg portion 33. An extending portion 36 is provided from the center of the third side 313 of the connecting portion 31 so as to be parallel to the main surface of the glass plate 10. A caulking portion 37 is provided at the tip of the extending portion 36.

  Here, as shown in FIG. 3, a corner where the first side 311 and the second side 312 intersect is a first corner 316, and a corner where the second side 312 and the third side 313 intersect is a second corner 317. In this case, the direction from the first corner 316 to the second corner 317 is the first direction X. In addition, an angle at which the first side 311 and the fourth side 314 intersect is a third corner 318, and a direction from the first corner 316 to the third corner 318 is a second direction Y. The direction opposite to the second direction Y is the third direction Z.

  As shown in FIG. 3, the first pedestal 34 and the second pedestal 35 are provided so as to project in the first direction X from the virtual extension line A ′ of the third side 313, and the caulking portion 37 is , The first pedestal 34 and the second pedestal 35 are provided at positions apart from the tips in the first direction in the first direction X. That is, the boundary line C between the extending portion 36 and the caulking portion 37 is located at the third side 313 of the connecting portion 31 rather than the imaginary line B connecting the tips of the first pedestal 34 and the second pedestal 35 in the first direction. Is provided in a position away from in the first direction X.

  Further, the center line A of the first pedestal 34 and / or the second pedestal 35 in the first direction X is preferably located within ± 1.0 mm with respect to the virtual extension line A ′ of the third side 313. Furthermore, as shown in FIG. 4, in the terminal 30, the distance a from the center of the plate thickness of the first pedestal 34 and / or the second pedestal 35 to the center of the plate thickness of the connecting portion 31 is 4.0 mm or less. It is preferable to have it.

  If the terminal 30 has the above-described shape, even if the caulking portion 37 is pulled in the first direction X, an external force is applied to the first pedestal 34 and the second pedestal 35, so that the terminal 30 is It is less likely to be damaged, and cracks are less likely to occur in the glass plate 10 and the conductive layer 20.

  The caulking portion 37 includes an upper surface portion 371 connected to the extending portion 36, a first bent portion 372 extending in the third direction Z of the upper surface portion 371, and a second direction Y of the upper surface portion 371. It has the extended 2nd bending part 373. As shown in FIG. 5, the caulking portion 37 bends the first bent portion 371 and the second bent portion 372 toward the main surface of the glass plate 10 to provide an electric circuit (not shown) provided in the vehicle. The terminal 30 and the conductive wire 60 may be electrically connected by crimping the conductive wire 50 connected to (a power supply circuit, a signal processing circuit, or the like). Note that, as shown in FIG. 6, the direction in which the first bent portion 371 and the second bent portion 372 are bent may be the direction opposite to the main surface of the glass plate 10.

  In the terminal 30, when the caulking portion 37 is provided at the above-described position, the first bending portion 372 and the second bending portion 373 are bent with a tool (pliers or the like) to crimp the conductive wire 50. The conductive wire 50 can be crimped by a single bending process without the pedestal 34 and the second pedestal 35 interfering with each other.

  As shown in FIG. 7, in a state in which the first bent portion 372 and the second bent portion 373 are developed in a planar shape (a state in which they are not crimped and not bent), a third direction of the first bent portion 372. The length from the edge F of Z to the center line D of the upper surface portion 371 parallel to the first direction X is from the center line D of the upper surface portion 371 parallel to the first direction X to the second position of the first pedestal 34. Is longer than the length to the edge E in the direction Y. Further, the length from the edge portion H of the second bent portion 373 in the second direction Y to the center line D of the upper surface portion 371 parallel to the first direction X is parallel to the first direction X of the upper surface portion 371. It is longer than the length from the center line D to the edge G of the second pedestal 35 in the third direction Z.

  In the terminal 30, if the caulking portion 37 has the above-described position and shape, the conductive wire 60 can be firmly fixed to the heating wire 60 without the first pedestal 34 and the second pedestal 35 interfering with each other. Can be crimped.

  The window glass for a vehicle with a terminal of the present invention is suitably used, for example, as a windshield, a sliding window, a fitting window, a rear glass and the like.

100 Window Glass for Vehicle with Terminal 10 Glass Plate 20 Conductive Layer 30 Terminal 31 Connection Part 311 First Side 312 Second Side 313 Third Side 314 Fourth Side 316 First Corner 317 Second Corner 318 Third Corner 32 First Leg Part 33 Second leg part 34 First pedestal 35 Second pedestal 36 Extending part 37 Caulking part 371 Upper surface part 372 First bending part 373 Second bending part 40 Solder layer 50 Conductive wire

Claims (8)

A window glass for a vehicle with a terminal, comprising a glass plate, a conductive layer formed on at least one main surface of the glass plate, and a terminal joined to the conductive layer by a solder layer,
The terminals are
The first side, the second side adjacent to the first side, the third side facing the first side, and the fourth side facing the second side are rectangular in plan view. A connecting portion provided,
A first leg connected to the second side; a first pedestal extending from the first leg and connected to the conductive layer by the solder layer;
A second leg connected to the fourth side; a second pedestal extending from the second leg and connected to the conductive layer by the solder layer;
An extending portion extending from the center of the third side so as to be parallel to the main surface of the glass plate, and a caulking portion provided at a tip of the extending portion,
Equipped with
An angle at which the first side and the second side intersect is a first angle, an angle at which the second side and the third side intersect is a second angle, and the first to the second If the direction toward the corner is the first direction,
The first pedestal and the second pedestal are provided so as to project in the first direction from a virtual extension line of the third side,
A windowpane for a vehicle with a terminal, characterized in that the caulking portion is provided at a position more distant in the first direction than the tips of the first pedestal and the second pedestal in the first direction. . An angle at which the first side and the fourth side intersect is a third angle, and a direction from the first corner to the third corner is a second direction, and a direction opposite to the second direction. Is the third direction,
In a plan view, the caulking portion includes an upper surface portion connected to the extension portion, a first bent portion extending in the third direction of the upper surface portion, and the second upper surface portion. A second bent portion extending in a direction, and when the first bent portion and the second bent portion are developed in a plane,
The length from the edge of the first bent portion in the third direction to the center line of the upper surface portion parallel to the first direction is a center line of the upper surface portion parallel to the first direction. From the first to the edge of the first pedestal in the second direction,
A length from an edge of the second bent portion in the second direction to a center line of the upper surface portion parallel to the first direction is a center line of the upper surface portion parallel to the first direction. The window glass for a vehicle with a terminal according to claim 1, which is longer than a length from the edge of the second pedestal in the third direction. The center line of the first pedestal and / or the second pedestal in the first direction is located within 1.0 mm from a virtual extension line of the third side in a plan view. Window glass for vehicles with terminals.   The distance from the center of the plate thickness of the said 1st pedestal and / or said 2nd pedestal to the center of the plate thickness of the said connection part is 4.0 mm or less, The any one of Claims 1-3. Window glass for vehicles with terminals.   The said terminal is formed by bending a metal plate, and the board thickness of the said metal plate is 0.3 mm or more and 1.0 mm or less, For vehicles with a terminal of any one of Claims 1-4. Window glass.   The terminal is electrically connected to a conductive wire connected to an electric circuit in a vehicle by bending and crimping the first bent portion and the second bent portion of the crimped portion. A vehicle window glass with a terminal according to item 5.   The window glass for vehicles with terminals according to any one of claims 1 to 6, wherein the metal plate is an alloy containing iron, chromium and / or nickel.   The window glass for a vehicle with a terminal according to claim 1, wherein the solder layer is a lead-free solder layer.

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