JP2004186827A - Manufacturing method of antenna system and antenna system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna system that is easily manufactured at a low manufacturing cost by providing first and second conductor parts formed on one side of a carrier and in crossing with each other without being contacted, and also to provide a manufacturing method of the antenna system. <P>SOLUTION: The antenna system is provided with an antenna main body 11 and a connector. The antenna main body 11 is completed by printing a conductor pattern 16 on one side 15a of an insulating sheet carrier 15 to form an antenna pattern 35 and a feeding part 37, and then folding back an inverting part 23 with the feeding part 37 formed thereon to the other side 15b. The antenna pattern 35 and the feeding part 37 are in crossing with each other and the antenna pattern 35 and the feeding part 37 can be insulated with each other. The connector electrically connected to the feeding part 37 keeps the folded shape of the inverting part 23. The conductor pattern 16 is formed only on the one side 15a of the carrier 15. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing an antenna device having a sheet-shaped carrier and an antenna device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a thin and inexpensive antenna device, a configuration in which an antenna wire is arranged on a plate-shaped base has been known. For example, as in the antenna device 1 shown in FIG. 9, a closed loop antenna pattern 3 and a pair of feed lines 4 extending inside the antenna pattern 3 are formed on one surface of a rectangular plate-shaped substrate 2. A pair of power supply lines 5 facing the edge of the base 2 is formed on the other surface of the base 2, and the power supply lines 4 and 5 are electrically connected to each other by a through hole 6 penetrating the base 2. Are known. However, in this configuration, it is necessary to form the antenna pattern 3 and the power supply lines 4 and 5 on both surfaces of the base 2 and a connection step of forming the through holes 6 is required, which makes it difficult to reduce the manufacturing cost. have.
[0003]
In addition, for example, in a configuration in which an antenna coil is provided in an IC card, a configuration is known in which both terminal portions of wires constituting the antenna coil are connected to an IC chip arranged on the inner peripheral side of the antenna coil. (For example, refer to Patent Document 1). In this configuration, one terminal of the antenna coil is disposed across the antenna coil, so that a thin film is sandwiched between the terminals or the contact portion so that the terminal does not contact another portion and short-circuit. The insulation is achieved by applying resin. However, this configuration has a problem that a member and an operation process for securing insulation are required, and it is difficult to reduce the manufacturing cost.
[0004]
In addition, for example, in a configuration in which an antenna coil is provided on an IC recording medium, a configuration is known in which both terminal portions of wires constituting the antenna coil are connected to an IC module disposed on the inner peripheral side of the antenna coil. (For example, see Patent Document 2). And also in this configuration, since one terminal of the antenna coil is disposed across the antenna coil, an insulated wire is used as a wire so that this terminal does not contact and short-circuit with another part. ing. However, if an insulated wire is used, it is necessary to remove the insulated wire from the terminal connected to the IC module, which requires processing costs, and it is difficult to form the insulated wire by printing, thereby reducing manufacturing costs. Have problems that are difficult.
[0005]
[Patent Document 1]
JP 2000-76400 A (page 3, FIG. 2)
[0006]
[Patent Document 2]
JP-A-2002-279383 (page 3, FIG. 1)
[0007]
[Problems to be solved by the invention]
As described above, the conventional configuration has a problem that it is not easy to reduce the manufacturing cost.
[0008]
The present invention has been made in view of such a point, and an object of the present invention is to provide a method of manufacturing an antenna device and an antenna device that can reduce the manufacturing cost.
[0009]
[Means for Solving the Problems]
2. The method for manufacturing an antenna device according to claim 1, wherein a conductive portion providing step of forming a first conductive portion and a second conductive portion on one surface of a sheet-shaped carrier, and a portion where the second conductive portion is formed. Is folded back to the other surface side of the carrier.
[0010]
In this configuration, the conductive portion may be formed on one surface of the carrier, and the antenna device including the first conductive portion and the second conductive portion that intersect without contacting each other is easily manufactured, and the manufacturing cost is reduced. Is reduced.
[0011]
According to a second aspect of the present invention, in the method of the first aspect, the carrier has a bendable and insulating property, and the first conductive portion and the second conductive portion are printed. The portion where the second conductive portion is formed is formed by cutting and raising a portion surrounded by the portion where the first conductive portion is formed and folded back to the other surface side.
[0012]
With this configuration, desired characteristics can be obtained by using the first conductive portion as a closed loop, and connection of other components to the second conductive portion becomes easy.
[0013]
The antenna device according to claim 3, wherein the sheet-like carrier includes a first surface portion located on one surface, and a second surface portion in which a portion continuous to the first surface portion is turned to the other surface side, A first conductive portion formed on the first surface portion; and a second conductive portion continuous on the first conductive portion and formed on the second surface portion.
[0014]
In this configuration, the conductive portion may be formed on one surface of the carrier, and the antenna device including the first conductive portion and the second conductive portion that intersect without contacting each other is easily manufactured, and the manufacturing cost is reduced. Is reduced.
[0015]
An antenna device according to a fourth aspect is the antenna device according to the third aspect, wherein the first conductive portion and the second conductive portion are arranged so as to intersect with an insulating carrier interposed therebetween.
[0016]
In this configuration, the first conductive portion and the second conductive portion are insulated by the carrier, so that desired characteristics can be obtained, and connection of other components to the second conductive portion becomes easy.
[0017]
An antenna device according to a fifth aspect is the antenna device according to the third or fourth aspect, wherein the first surface on which the first conductive portion is formed has a closed loop shape, and the second surface on which the second conductive portion is formed. The portion surrounded by the first surface portion is cut and raised on the other surface side.
[0018]
With this configuration, desired characteristics can be obtained by using the first conductive portion as a closed loop, and connection of other components to the second conductive portion becomes easy.
[0019]
An antenna device according to a sixth aspect of the present invention is the antenna device according to any one of the third to fifth aspects, wherein the first surface portion and the second surface portion are held in a stacked state with each other, and the second conductive portion is electrically connected. It is provided with a connector to be connected to the main body.
[0020]
In this configuration, the shape of the partially folded carrier is maintained by the connector electrically connected to the second conductive portion.
[0021]
An antenna device according to a seventh aspect is the antenna device according to the sixth aspect, wherein the connector includes an engagement portion, and the carrier includes an engagement receiving portion with which the engagement portion is engaged.
[0022]
In this configuration, the connector is firmly fixed to the carrier by the engagement between the engagement portion of the connector and the engagement receiving portion of the carrier.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method for manufacturing an antenna device and an embodiment of the antenna device of the present invention will be described with reference to the drawings.
[0024]
2 and 3, reference numeral 10 denotes an antenna device. The antenna device 10 is a planar antenna that is attached to, for example, the body of an automobile and receives radio waves such as traffic jam information for a navigation system. A connector that is mechanically and electrically connected to the antenna body;
[0025]
As shown in FIGS. 1 to 3, the antenna main body 11 includes a sheet-shaped carrier 15 having an insulating property and a conductive pattern 16 formed on one surface 15 a which is the surface of the carrier 15.
[0026]
The sheet-like carrier 15 is formed by folding a substantially central portion of a resin film having an insulating property in a plane substantially rectangular shape toward the other surface 15b, which is the back surface, with a substantially U-shaped slit 21 to form a rectangular frame. A flat plate portion 22 and a tongue-shaped inverted portion 23 that is folded back to the other surface 15b side are formed. Here, the sheet shape includes an elastically deformable film shape, a flexible and easily bendable configuration, a flexible plate shape, and the like, has insulating properties, and bends the inverted portion 23. Anything that does not break in the damaged state may be used. Hereinafter, a surface portion remaining in a frame shape other than the inverted portion 23 on one surface 15a of the carrier 15 is referred to as a first surface portion 31, and a surface portion bent toward the other surface 15b as the inverted portion 23 is referred to as a second surface portion 32. Name. Further, the tip portion 23a of the folded reversing portion 23 is folded so as to be aligned with the edge of one end of the carrier 15.
[0027]
In addition, the conductive pattern 16 is formed by printing a conductive material such as a conductive paste on the one surface 15a of the carrier 15, depositing or etching the conductive material, that is, applying the conductive material on the one surface 15a before bending the inversion portion 23. It is formed. The conductive pattern 16 includes an antenna pattern 35 forming a first conductive portion, an intermediate power feeding portion 36 forming a first conductive portion, and a power feeding portion 37 forming a second conductive portion. The antenna pattern 35 is formed in a closed loop on the first surface 31 along the vicinity of the outer periphery of the carrier 15. In addition, the intermediate power supply section 36 constitutes a power supply section which is a power supply line, and a pair of both sides protrude from a predetermined position of the antenna pattern 35 to the inner peripheral side along the width direction. Further, a pair of power supply portions 37 are formed in a continuous manner in a direction intersecting from the front end portions of the intermediate power supply portions 36 and along the longitudinal direction of the second surface portion 32 up to the front end portion 23a of the reversing portion 23. A terminal portion 38 having a large width is formed at each end.
[0028]
The conductive pattern 16 crosses the antenna pattern 35 and the feeder 37 in a plan view, that is, when viewed from the direction along the thickness direction of the carrier 15. 37 is insulated by the carrier 15 located therebetween, thereby preventing a short circuit, and ensuring the electrical characteristics of the antenna pattern 35.
[0029]
As described above, the antenna main body 11 includes a pattern printing step as a conductive part providing step for forming the antenna pattern 35, the intermediate power supply part 36, and the power supply part 37 shown in FIG. , A slit 21 and a folding step of folding the reversing portion 23 shown in FIG. 1B. Here, it is necessary to perform a turn-back step after the pattern printing step. However, the pattern printing step and the cutting step may be performed before the pattern printing step or may be performed before the cutting step.
[0030]
On the other hand, as shown in FIGS. 2 and 3, the connector 12 includes a substantially box-shaped case body 41 and a pair of terminal bodies 43 housed and attached inside the case body 41. The case body 41 is formed of an insulating synthetic resin or the like, and has a slit-shaped insertion hole 45 extending from the front surface to the side surfaces on both sides. A feeder hole 48 having a square or circular shape into which a feeder 47 which is an electric wire having a core wire connected to each of the cores 43 is inserted is formed. Then, a part of a portion where the flat plate portion 22 and the reversing portion 23 of the antenna main body 11 overlap with each other can be inserted from the insertion port 45. Further, a contact portion 49 that contacts the upper surface of the flat plate portion 22 of the inserted antenna body 11 is formed inside the case body 41.
[0031]
Each terminal body 43 is formed by, for example, press-forming a metal plate having conductivity and elasticity, and includes an antenna connection portion 51 and a feeder connection portion 53 connected to the antenna connection portion 51. . The antenna connecting portion 51 is, for example, bent in a substantially rectangular shape and supported so as to be elastically deformable, and is provided on the other surface 15 b side of the antenna main body 11 inserted into the insertion port 45, that is, on the reversing portion 23. The corner portions are pressed into contact with the terminal portions 38 and the like of the power feeding portions 37 and are electrically connected, and the antenna body 11 is placed between the antenna connection portion 51 and the contact portion 49 by the urging force of the metal plate. It is sandwiched and mechanically connected to the antenna body 11.
[0032]
That is, in a state where the antenna main body 11 is mounted on the connector 12, the connector 12 holds the portion where the antenna main body 11 is folded and the flat plate portion 22 and the inversion portion 23 are laminated, and holds the shape of the antenna main body 11. It functions as a tool. On the other hand, the feeder connecting portion 53 is formed in, for example, a substantially C-shape, is caulked using a jig such as pliers, is electrically connected to the core wire, and is also provided for holding the cover of the feeder 47. Mechanically connected. The feeder 47 is connected to a navigation system (not shown) mounted on the vehicle body.
[0033]
As described above, according to the present embodiment, the conductive pattern 16 is printed only on one surface 15a of the carrier 15 in a state where the first surface 31 and the second surface 32 are substantially a single surface, and the antenna pattern 35 is formed. And the power supply section 37, the number of manufacturing steps can be greatly reduced as compared with a configuration in which conductive patterns are printed on both surfaces, and processing for through holes and the like is not required, thereby reducing manufacturing costs.
[0034]
Then, while forming the conductive pattern 16 on one surface 15a of the carrier 15, the portion where the power supply portion 37 was formed was cut and raised by the slit 21 to form the reversal portion 23 and overlapped on the other surface 15b side. The portion 37 can be reliably insulated by the carrier 15 having a thickness of two sheets, and the electrical characteristics can be ensured, and an insulating process using a separate member or the like is not required, and the manufacturing cost can be reduced.
[0035]
Then, since the reversing part 23 is folded, the terminal part 38 of the feeding part 37 is located at the edge of the antenna body 11, and the folded carrier 15 is clamped by the connector 12, so that the antenna 12 Can easily be electrically connected to each other, and the connection work can be facilitated.
[0036]
Furthermore, the connector 12 can function as a holder for holding the shape of the antenna main body 11 by sandwiching a portion where the antenna main body 11 is folded and the flat plate portion 22 and the reversing portion 23 are laminated, and a separate bonding operation is performed. By eliminating the need for clips and clips, manufacturing costs can be reduced.
[0037]
In this manner, a low-cost antenna device 10 that can be manufactured by a rational process can be provided.
[0038]
In addition, in addition to the configuration shown in FIGS. 1 to 3 described above, a structure is provided in which the antenna main body 11 and the connector 12 are engaged, and the antenna main body 11 and the connector 12 can be positioned and fixed.
[0039]
For example, as shown in FIGS. 4 and 5, an engagement receiving portion 61 such as a square hole is provided on the inverted portion 23 of the carrier 15 and the flat plate portion 22 where the inverted portion 23 overlaps, and By providing an engaging portion 63 which is a claw-shaped protrusion, and engaging the engaging receiving portion 61 with the engaging portion 63, the antenna main body 11 and the connector 12 can be positioned and fixed. Further, each of the engagement portions 63 has an inclined surface on the front side where the antenna main body 11 is inserted and a vertical surface on the rear side, thereby facilitating the work of connecting the antenna main body 11 to the connector 12 and firmly preventing the antenna main body 11 from coming off. I can do it. Further, by displacing the opposing engaging portion 63 and the engaging receiving portion 61 forward and backward, that is, along the insertion direction of the antenna body 11, the carrier 15 can climb over while sequentially deforming the engaging portion 63. The operation of connecting the antenna body 11 to the connector 12 can be facilitated.
[0040]
Further, in the antenna device 10, one or both of the antenna main body 11 and the connector 12 are engaged with and adhered to a member to be mounted provided on the vehicle body side, and are arranged at a desired position.
[0041]
Next, an example of mounting the antenna device 10 will be described with reference to FIGS. The antenna device 10 is attached to a spoiler 74 as an attached member attached to a trunk lid 72 at a rear portion of a vehicle body 71 of an automobile. The spoiler 74 is formed by combining an upper half shell 75 and a lower half shell 76 obtained by injection-molding an ABS resin, and has a hollow portion 77 inside. The antenna device 10 is disposed in the hollow portion 77, and is further attached to an attached portion 81 provided on the inner surface side of the upper half shell 75 in a state where the above description is inverted. As shown in FIG. 6, a plurality of, in this embodiment, three, caulking pins 83 are protruded from the attached portion 81, and the positions of the caulking pins 83 are adjusted to fit the antenna device 10. A caulking receiving portion 85 which is a circular through hole is formed on the carrier 15 of the antenna main body 11. Therefore, as shown in FIG. 8, in a state where each of the caulking pins 83 is inserted into the caulking receiving portion 85, as shown in FIG. Fixed. The feeder 47 connected to the antenna device 10 is connected to a navigation system (not shown) attached to the vehicle body 71 through a hollow portion 77 of the spoiler 74 and a through hole 87 provided in the trunk lid 72.
[0042]
Further, in each of the above embodiments, the antenna main body 11 of the antenna device 10 is described as being flat, but in use, the antenna main body 11 is installed by being curved or bent or folded. Can be adapted to the shape of the part or the directivity can be adjusted.
[0043]
Further, in the above-described embodiment, the antenna pattern 35 is a closed loop, but the present invention is not limited to this configuration, and a coiled antenna can be configured. In this case, the feeding portion connected to one end of the antenna pattern can be formed on the inversion portion as the third surface portion, and the other end portion can be formed on the first surface portion of the flat plate portion 22. .
[0044]
【The invention's effect】
According to the method for manufacturing an antenna device according to claim 1, the conductive portion may be formed on one surface of the carrier, and the antenna device includes the first conductive portion and the second conductive portion that intersect without contacting each other. Can be easily manufactured, and the manufacturing cost can be reduced.
[0045]
According to the manufacturing method of the antenna device of the second aspect, in addition to the effect of the first aspect, the carrier has a bendable and insulating property, and the first conductive portion and the second conductive portion are formed by printing. The portion formed and formed with the second conductive portion cuts and raises a portion surrounded by the portion formed with the first conductive portion and is turned back to the other surface side, so that the first conductive portion has a desired characteristic as a closed loop. And other components to the second conductive portion can be easily connected.
[0046]
According to the antenna device of the third aspect, the conductive portion may be formed on one surface of the carrier, and the antenna device including the first conductive portion and the second conductive portion that intersect without contacting each other can be easily formed. It can be manufactured, and the manufacturing cost can be reduced.
[0047]
According to the antenna device of the fourth aspect, in addition to the effect of the third aspect, the first conductive portion and the second conductive portion are arranged so as to intersect with the insulating carrier interposed therebetween. The first conductive portion and the second conductive portion are insulated by the carrier, so that desired characteristics can be obtained, and connection of other components to the second conductive portion can be facilitated.
[0048]
According to the antenna device of the fifth aspect, in addition to the effect of the third or fourth aspect, the first surface portion on which the first conductive portion is formed has a closed loop shape, and the second conductive portion is formed. Since the second surface portion has a portion surrounded by the first surface portion cut and raised on the other surface side, desired characteristics can be obtained by using the first conductive portion as a closed loop, and other characteristics to the second conductive portion are obtained. Connection of parts and the like can be facilitated.
[0049]
According to the antenna device of the sixth aspect, in addition to the effect of any one of the third to fifth aspects, the shape of the partially folded carrier is maintained by the connector electrically connected to the second conductive portion. it can.
[0050]
According to the antenna device of the seventh aspect, in addition to the effect of the sixth aspect, the connector can be firmly fixed to the carrier by the engagement between the engagement portion of the connector and the engagement receiving portion of the carrier.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a manufacturing process showing an embodiment of an antenna device of the present invention.
FIG. 2A is a state in which a conductive pattern is formed. FIG. 2B is a state in which an inverted portion is folded. FIG. 2 is a perspective view of the antenna device.
FIG. 3 is a sectional view of the antenna device, taken along the line II in FIG. 2;
FIG. 4 is an explanatory view of a manufacturing process showing another embodiment of the antenna device of the present invention.
FIG. 5A is a state in which a conductive pattern is formed. FIG. 5B is a state in which the inverted portion is folded. FIG. 5 is a cross-sectional view of the antenna device at a position corresponding to II-II in FIG.
FIG. 6 is a partially exploded perspective view showing a state in which the antenna device is attached to an automobile.
FIG. 7 is a partially cutaway perspective view of the automobile.
FIG. 8 is a sectional view of the vehicle, taken along the line III-III in FIG. 7;
FIG. 9 is a perspective view showing a conventional antenna device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Antenna device 15 Carrier 15a One surface 15b Other surface 31 First surface part 32 Second surface part 35 Antenna pattern 36 constituting a first conductive part Intermediate feeding part 37 constituting a first conductive part 37 Second conductive part Constituting power supply part 61 engagement receiving part 63 engagement part

Claims (7)

A conductive portion providing step of forming a first conductive portion and a second conductive portion on one surface of a sheet-like carrier;
A folding step of folding a portion where the second conductive portion is formed on the other surface side of the carrier. The carrier has a bendable and insulating property,
The first conductive portion and the second conductive portion are formed by printing,
2. The antenna device according to claim 1, wherein the portion where the second conductive portion is formed is cut and raised at a portion surrounded by the portion where the first conductive portion is formed, and is folded back to the other surface side. 3. Manufacturing method. A first surface portion located on one surface, and a sheet-shaped carrier including a second surface portion in which a portion continuous to the first surface portion is folded back to the other surface side;
A first conductive portion formed on the first surface portion;
An antenna device, comprising: a second conductive portion formed on the second surface portion following the first conductive portion. 4. The antenna device according to claim 3, wherein the first conductive portion and the second conductive portion are arranged to intersect with an insulating carrier interposed therebetween. The first surface on which the first conductive portion is formed has a closed loop shape, and the second surface on which the second conductive portion is formed has a portion surrounded by the first surface cut to the other surface. The antenna device according to claim 3, wherein the antenna device is raised. The connector according to any one of claims 3 to 5, further comprising a connector that holds the first surface portion and the second surface portion in a state of being stacked on each other and that is electrically connected to the second conductive portion. Antenna device. The antenna device according to claim 6, wherein the connector includes an engagement portion, and the carrier includes an engagement receiving portion with which the engagement portion engages.

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