JP2001052846A - Conductor-including window and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductor-including resin window capable of simplifying the setting of conduction parts for terminal connection used for connecting a conductor print to a terminal and high in reliability of conduction. SOLUTION: In a conductor-including resin window made by sandwiching a conductor print formed by printing a resin film 4 with conductive ink between a resin panel 2 and a resin film 4 joined to the resin panel 2, the conductive ink is exposed to the outer surface side of the resin film 4 through a group of small holes provided in the resin film 4, thereby forming conduction parts 5 for terminal connection with continuity to the conductor print 3. A terminal 6 is placed on the conduction parts 5 and fastened thereto by tapping screws 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window used for, for example, a window glass of an automobile, and more particularly to a window having a conductor having a conductor such as an antenna or a defogger, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Heretofore, there has been known an automobile provided with a printed wire such as an antenna for receiving broadcast and a defogger for preventing fogging on a window glass (often a rear window glass) of an automobile. FIG. 9 shows an example of a terminal structure of an antenna provided on the window glass 31, and FIG. 10 shows a portion B in FIG. The illustrated vehicle window glass antenna forms an antenna 32 by printing conductive ink on a room side of a window glass 31 in a predetermined pattern and then printing the conductive ink, and a sufficient electrical connection is obtained to a part of the antenna 32. Such a wide conductive portion 33 is formed, and the terminal 34 is fixed thereto by soldering 35.

[0003] In recent years, in the field of the automobile industry, there has been an attempt to apply a resin window instead of a window glass. However, when an antenna is to be formed in a resin window, the antenna printed on the resin panel cannot be burned with high heat comparable to that of glass due to the heat resistance of the resin panel. In addition, there is a problem that the wire is easily broken, and similarly, the low-temperature solder that can be used within the allowable range of the heat resistance of the resin panel is inferior in the mounting strength, and the like. Therefore, the glass structure shown in FIG. Can not do. Therefore, in order to replace glass with resin, it is necessary to change the entire structure. For example, one of the methods is disclosed in
It is conceivable to apply a structure in which the antenna described in 155804 is arranged in laminated glass and a terminal is drawn out from the outer end of the glass. Specifically, FIGS. 11 and 1
As shown in FIG. 2, a resin film 4 in which a conductive wire print 41 of a predetermined pattern is formed by printing conductive ink on one surface.
2 is bonded to the surface of the resin panel 43 so that the conductive wire print 41 is on the inside, so that the resin panel 4
It is conceivable to form a resin window with a conductor in which the conductor print 41 is sandwiched between the resin film 3 and the resin film 42.

[0004]

By the way, when the above-described structure for sandwiching the printed wire 41 is adopted, a part of the printed wire 41 is connected to the terminal 41 fixed to the printed wire 41 and the resin panel 43. It is necessary to set a conductive portion made of a conductive material (made of metal) for connection with a conductive member (not shown). Such a conductive portion is realized by adopting a configuration in which the copper foil tape 44 is wound around the terminal of the resin film 42, for example, at a position where it is unlikely to obstruct the rear view, as shown in the drawing.
And terminals can be connected. However, when such a configuration is employed, a separate process is required for setting the conductive portion due to the use of another component such as the copper foil tape 44, and thus a component cost and an installation labor are required. , Which leads to an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to easily set a conductive portion for terminal connection used for connection between a printed wire and a terminal. It is an object of the present invention to provide a window with a conductive wire which can be connected and has high reliability of conduction and a method of manufacturing the same.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a lead-wired window according to the present invention has a structure as described in each of the claims. Therefore, according to the first aspect of the present invention, since the conductive portion for connecting the terminals is formed by an integral structure using the printed wire itself, the reliability of the conduction can be improved. In addition, since the conductive portion can be formed using the conductive ink for conducting wire printing, the conducting portion can be formed at the same time when conducting wire printing is performed. For this reason, compared with the case where the conductive part is formed by using a separate part after printing, it is possible to reduce the cost of parts, reduce the number of work steps, shorten the work time, and the like, and achieve cost reduction.

In this case, it is desirable that the conductive portion setting holes provided in the resin film be a group of a large number of small holes. In general, the conductive ink shrinks due to the evaporation of the solvent in the ink when solidified by heating and drying performed after printing. At this time, if the conductive ink is constituted by a group of small holes, the amount of shrinkage of the ink is suppressed and the conductive ink is flush with the film surface. Alternatively, a swelling state can be secured. Claim 3
When the ink reservoir is formed on the surface side of the resin film as in the invention, the surface area of the conductive portion can be formed large to improve the reliability of conduction with the terminal.

Further, according to the method for manufacturing a window with a conductive wire according to the invention of claim 4, when a conductive wire print is printed on the resin film using conductive ink, the conductive portion for terminal connection can be simultaneously formed. it can. For this reason, the operation of forming the conductive portion is greatly simplified as compared with the case where it is performed in a separate step, and the operation efficiency is improved. In this case, if the method of filling the conductive ink into the holes using the squeegee pressure at the time of screen printing is adopted as in the invention according to claim 5, it is possible to adjust the squeegee pressure without using a special pressing means. Filling becomes possible.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing a resin window with a conductive wire, FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. 3 is a plan view of FIG. The resin window 1 according to the present embodiment is applied to, for example, a rear window of an automobile. As shown in the drawing, a resin window 1 is mainly composed of a resin panel 2 made of a transparent polycarbonate resin, and one side (inside of the vehicle) of the resin panel 2 has one surface for receiving broadcasts such as radio and television. The antenna print or the heat ray print 3 for preventing fogging (shown in FIG. 1 is a heat ray print. Hereinafter, in the description of the embodiment, referred to as a conductor wire print), and the other surface is hard-coated and is transparent. A resin film 4 made of polycarbonate resin is joined with the conductive wire print 3 inside. The conductive wire print 3 is formed in a predetermined pattern by printing a conductive ink including silver as a conductive material (in addition, copper, gold, nickel, carbon, and aluminum can be used). In the present embodiment, the left and right end portions extending in the vertical direction are formed wide.

As shown in FIGS. 2 and 3, a large number of small holes are provided at the terminal mounting position of the resin film 4, for example, at a substantially middle position in the vertical direction of the wide conductive wire print 3 at both right and left ends. The conductive ink which is the base material of the conductive wire print 3 is exposed on the front side through the group. That is, a portion of the conductive wire print 3 is exposed to the film surface side through the small hole group in a substantially flush state or a slightly raised state, thereby forming the conductive portion 5 for terminal connection. A terminal 6 for connecting the conductive wire print 3 to a feeder wire (not shown) is provided on the front surface side of the resin film 4.
Are superimposed and attached to the conducting portion 5. The terminal 6 has, at its base end, a flat mounting seat 6a having a size slightly larger than the area of the conduction section 5 (that is, the small hole group area), and the mounting seat 6a has an appropriate number of mounting holes 6b. Is provided. The terminal 6 is fastened to the resin window 1 by a tapping screw (bolt) 7 screwed into the resin panel 2 through the mounting hole 6b in a state where the mounting seat 6a is overlapped so as to contact the upper surface of the conducting portion 5. A resin film 8 made of a transparent polycarbonate resin whose surface is hard-coated is joined to the other surface (outside of the vehicle) of the resin panel 2 to protect the surface of the resin window 1 on the outside of the vehicle. I have.

[0011] Resin window 1 with conductive wire constructed as described above
Is manufactured by the steps described below. The resin window 1 is formed by an in-mold molding method. As a preparation stage, two resin films 4 and 8 for setting in an injection shaping mold are prepared. First, one resin film 4 is cut into a predetermined size by a press. In the cutting step, a terminal 11 a for punching is provided at a terminal mounting position of the resin film 4 as shown in the schematic diagram of FIG. A large number of small hole groups 4a are penetrated in a range corresponding to the width of the mounting seat 6b of the terminal 6 by using the upper die 11 having the upper die 11 and the lower die 12 having the pin holes 12a.

Thereafter, the conductor print 3 is printed on one surface (back surface) of the resin film 4 in a predetermined pattern by screen printing. That is, as shown in the schematic diagram of FIG. 5, the conductive ink 16 is printed on the resin film 4 through the screen 14 by the squeegee 15 made of a spatula-shaped rubber that moves on the screen 14 stretched on the printing plate frame 13. At this time, the conductive ink 16 is filled in the small hole group 4a by the pressurization by the squeegee 15 and is exposed on the other surface (front surface) side, thus forming the conductive portion 5 as shown in the sectional view of FIG. Is done. In this case, it is desirable to set the exposed end portion to be slightly raised with respect to the surface of the resin film 4, and if necessary, to form a concave portion in a portion corresponding to a group of small holes on a printing table supporting the resin film 4. By setting or performing screen printing using a dedicated jig, as shown in FIG. 7, the terminal 6 is slightly raised from the surface of the resin film 4 on the ink exposed end side to correspond to the mounting seat 6 a of the terminal 6. It is desirable to set the ink reservoir 9 of the conductive ink having a size.

Thereafter, the conductive ink is solidified through a baking (drying) process at a low temperature to form the conductive wire print 3 and the conductive portion 5. The heating in the drying step evaporates the solvent in the conductive ink and shrinks the ink. However, in this embodiment, the shrinkage amount of each hole is small because the structure is made to pass through the small hole group 4a. This is advantageous in suppressing depression of the edge from the film surface. Subsequently, the other surface of the resin film 4 is subjected to a hard coat treatment in a state where the conductive portion 5 is masked. Thus, one resin film 4 is prepared. On the other hand, a polycarbonate resin film 8 cut to a predetermined size and having one surface subjected to a hard coat treatment
Is prepared.

Next, as shown in FIG. 8, the two types of resin films 4 and 8 are set in the upper mold 21 and the lower mold 22 (in the cavity) of the injection mold. Positioning is maintained. Thereafter, the mold is clamped and the mold is filled with the molten polycarbonate resin. Then, if the mold is removed after the resin is cooled, the resin window 1 with a conductive wire, which is a plate-like injection product, is obtained. In the above-mentioned in-mold molding, the filling resin and the resin films 4, 8
Are the same type of polycarbonate resin, the adhesiveness between the resin films 4, 8 and the resin panel 2 is improved, and the integration is ensured.

Next, as shown in FIG. 2, the terminal 6 is passed through the mounting hole 6b in a state where the mounting seat 6a is placed on the upper surface of the conductive portion 5 in the resin-containing resin window 1 manufactured as described above. It is fastened by screwing a tapping screw 7 into a prepared hole formed in the resin panel 2 in advance. In this case, since the mounting seat 6a is fastened to the conductive portion 5 in a pressurized state, conductivity between the conductive portion 5 and the terminal 6 is ensured. If it is set in a slightly raised state, the conductive portion 5
Is strengthened, and the conductivity between the conductive portion 5 and the terminal 6 can be further enhanced.
In particular, when the ink reservoir 9 is provided in the conductive portion 5, the contact area of the conductive portion 5 with the terminal 6 is increased, so that the reliability of conduction can be improved. The pilot hole into which the tapping screw 7 is screwed may be formed at the time of molding the resin panel 2 or after molding.

The resin window 1 having a lead wire, which is constructed and manufactured as described above, is protected on both the inside and outside of the vehicle by covering the surfaces with the resin films 4 and 8 subjected to the hard coating process. It is hard to be scratched and its durability is maintained for a long time. In the present embodiment, since the conductive portion 5 can be formed using the conductive ink for the conductor print 3, the conductive portion 5 can be formed simultaneously with the printing of the conductor print 3. For this reason, compared with the case where the conductive part is formed by using a separate part after printing, it is possible to reduce the cost of parts, reduce the number of work processes, shorten the work time, and the like, and as a result, reduce the cost. . Further, in the present embodiment, the conducting portion 5
Has an integral structure with the conductor print 3, so that the reliability of the conductivity can be improved as compared with the type in which the connection is made by using another component.

In this embodiment, as a means for forming the conductive portion 5, the conductive ink is filled in the small hole group 4a by efficiently utilizing the pressure applied by the squeegee 15 performed during screen printing. However, the printing method is not necessarily limited to screen printing, and it is possible to adopt any printing method that applies pressure to the conductive ink during printing, such as letterpress, intaglio printing, or the like. is there. In addition, although the group of small holes 4a is provided in the resin film 4 to form the conductive portion 5, the number is not particularly limited, and the groups need not be formed.
Also, the size of the hole is not particularly limited. However, the conductive ink currently used generally for antennas and the like at present has a problem in that the solvent evaporates during the drying step, and
When the conductive ink is used, there are desirable conditions for conduction when the conductive ink is used, and a hole having an excessively large diameter is basically not preferable.

Further, in the present embodiment, the resin panel 2 and the resin films 4 and 8 are made of polycarbonate, respectively. However, the present invention is not limited to this. At the time of molding the resin panel 2, it is most preferable that compatible resins ensure sufficient adhesive strength to the resin films 4 and 8. However, even if the combination is such that the direct compatibility between the resins is weak, By arranging a binder layer (adhesive layer) between them, it is possible to increase the bonding strength. In addition, not only the combination of the resin panel and the resin film, but also a window with a conductive wire in which an antenna is attached to a glass panel with a resin film printed with conductive ink, for example, a practically open window 04-0.
55809. Further, the resin used for the resin window 1 is not limited to a transparent resin, and a translucent or colored resin may be appropriately selected. Further, the structure for fixing the terminal 6 to the resin panel 2 is not limited to the illustrated tapping screw 7. For example, an appropriate number of pins are provided on the resin panel 2, and after passing through a hole provided in the mounting seat of the terminal 6. Alternatively, the configuration may be changed to a configuration in which fixing is performed by thermal caulking, or a configuration in which an appropriate number of claws are set in the mounting seat of the terminal 6 by cutting and raising, and the claws are inserted and fixed to the resin panel 2 by an ultrasonic insert.

Also, the present embodiment has been described for the case where the present invention is applied to a rear window of an automobile.
A window other than a vehicle such as a show window may be used as well as a window other than the rear window. Furthermore, in the present embodiment, the resin films 4 and 8 have been described. However, a sheet generally assumed to be thicker than the film may be used. In short, the resin film referred to in the present invention includes a resin sheet.

[0020]

As described in detail above, according to the present invention,
A conductive portion for terminal connection used for connection between the conductor print and the terminal can be easily set, and a resin window with a conductive wire with high conduction reliability can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing a lead-containing resin window according to the present embodiment.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a schematic view illustrating punching of a resin film.

FIG. 5 is a schematic diagram illustrating screen printing.

FIG. 6 is a sectional view showing a conductive portion of a resin film.

FIG. 7 is a cross-sectional view illustrating a modification example regarding a conduction portion.

FIG. 8 is an explanatory view showing a molding mode of a resin panel.

FIG. 9 is a cross-sectional view showing a conventional window with a glass conductor.

FIG. 10 is a perspective view of a portion B in FIG. 9;

FIG. 11 is a plan view exemplifying a case where a conductive portion for connecting a conductive wire print and a terminal is set in a resin window containing a conductive wire.

FIG. 12 is a sectional view taken along line CC of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Resin window 2 ... Resin panel 3 ... Conducted wire print 4 ... Resin film 4a ... Small hole group 5 ... Conduction part 6 ... Terminal 9 ... Ink pool

Claims (5)

[Claims] 1. A conductive wire formed by sandwiching a conductive wire print formed by printing conductive ink on a resin film between a transparent material panel and a resin film bonded to the transparent material panel. A window, wherein the conductive ink is exposed on the surface side of the resin film through an appropriate number of holes provided in the resin film, thereby forming a conductive portion for terminal connection continuously with the conductive wire print. A window with a conductive wire, the exposed end of which is provided flush or raised with respect to the resin film surface. 2. The lead-containing window according to claim 1, wherein said hole is formed by a group of small holes. 3. The window with a conductive wire according to claim 2, wherein a conductive ink exposed from each of the small holes is provided on the surface side of the resin film so as to be continuous with each other. 4. A conductive wire formed by sandwiching a conductive wire print formed by printing conductive ink on the resin panel between a transparent material panel and a resin film bonded to the transparent material panel. In a method for manufacturing a window, in a stage before joining the transparent material panel and a resin film, after penetrating an appropriate number of holes in the resin film, a conductive ink is printed on one surface of the resin film. A method for manufacturing a lead-containing window, wherein a conductive ink is filled in the hole and exposed on the opposite surface of the resin film to form a conductive part for terminal connection when setting a lead print of a predetermined pattern. 5. The method according to claim 4, wherein the printing of the conductive wire is performed by screen printing, and the filling of the conductive ink into the hole is performed by a squeegee pressure during screen printing. Method of manufacturing entrance windows.