JPH0976675A - Antenna module for card and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna module for a card which makes it possible to be automatically assembled in the card without increasing in size and without deforming an antenna. SOLUTION: This antenna module for a card comprises a spacer core 1 for mounting an IC module 2, and an antenna coil 3 formed by winding a metal wire material on the outer periphery of the core 1 and connected to the module 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card antenna module applied to, for example, a wireless card and a manufacturing method thereof.

[0002]

2. Description of the Related Art A wireless card has a substrate on which an I
An electronic component such as a C module is attached and an antenna connected to the electronic component is attached. The antenna is usually formed on the substrate in a pattern, or a wire is wound by a winding jig to form an antenna, and the antenna is attached to the substrate.

[0003]

However, the one in which the antenna is formed in a pattern on the substrate requires a substrate having the same size as the outer dimensions of the antenna, which increases the size of the substrate and increases the cost. Further, in a case where an antenna is formed by winding a wire, when the antenna is detached from the winding jig, the antenna is deformed or the antenna is manually attached to the substrate, which results in poor manufacturing efficiency. .

Therefore, an object of the present invention is to provide a card antenna module which can be automatically incorporated into a card without increasing the size and without deforming the antenna, and a manufacturing method thereof. To do.

[0005]

In order to solve the above-mentioned problems, the present invention provides a card core to which an electronic component is attached and a metal wire rod wound around an outer peripheral surface of the card core. An antenna coil formed and connected to the electronic component.

According to a third aspect of the present invention, the electronic component is attached to the card core, and the printed surface is held on at least one surface side of the card core, and the outer peripheral surface of the card core has a surface on which the printed surface is held. An antenna coil formed by winding a low metal wire and connected to the electronic component.

According to a fourth aspect of the present invention, the electronic component is attached to the card core, the printed surface of which is held on at least one surface side, and a metal wire is wound around the outer peripheral surface of the card core. An antenna coil connected to an electronic component via a lead-in wire, the lead-in wire being wired in a state of protruding in a surface direction opposite to a surface on a side where a printed surface of the card core is held. .

According to a fifth aspect of the present invention, there is provided a card core having an electronic component attached thereto and a printing surface held on at least one surface side, and a surface of the card core on a side holding the printing surface. A positioning sheet having an outer dimension larger than that of the core and having an outer peripheral edge portion projecting outward from the outer peripheral edge portion of the card core; and a side where the printing surface of the card core is held by the positioning sheet on the outer peripheral surface portion of the card core. And an antenna coil that is positioned and mounted so as not to project in the plane direction and is connected to the electronic component.

According to a seventh aspect of the present invention, there is provided a holding step of holding the card core by a pair of holding members from both sides of the card core, and the outer circumference of the card core rotated by the holding step. A winding step of winding a metal wire around the surface portion to form an antenna coil, and after the antenna coil is formed by this winding step, a card core from the holding member and an antenna coil integrated with the card core are attached. And a step of taking out.

According to the first, third, fourth and seventh aspects of the present invention, the card core and the antenna coil are integrated by forming the antenna coil by winding a metal wire around the outer peripheral surface of the card core. Allows to be automatically incorporated into the card without deformation.

According to a third aspect of the present invention, an antenna coil is formed by winding a metal wire around the outer peripheral surface of the card core so as to be lower than the surface of the card core on which the printed surface is held. The antenna coil is separated from the printing surface to avoid the influence of the metal wire rod at the time of printing so that good printing can be performed.

According to a fourth aspect of the present invention, the influence of the lead-in line at the time of printing is provided by arranging the lead-in line so as to project in the direction opposite to the surface of the card core opposite to the side holding the printing surface. Avoid it so that you can print well.

According to a fifth aspect of the present invention, a positioning sheet having an outer dimension larger than that of the card core is provided on the surface of the card core on which the printing surface is held, and the outer peripheral edge portion of the positioning sheet is the outer peripheral edge of the card core. The antenna coil mounted on the card core is positioned by the positioning sheet by projecting outward from the section, and the antenna coil is prevented from projecting on the surface of the card core on the printed surface holding side, and the influence of the metal wire rod is prevented. Avoid it so that you can print well.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to an embodiment shown in FIGS. 3 is a plan view showing the wireless card K, and FIG. 4 is a side sectional view thereof. 1 in the figure
Is a spacer core as a card core. An IC module 2 as an electronic component is soldered to the spacer core 1, and a coil antenna 3 made of a metal wire is wound around the outer peripheral surface of the spacer core 1. Has been done. The front and back surfaces of the spacer core 1 are covered with front and back sheet materials 4 and 5, and a resin 6 is filled and solidified between the front and back sheet materials 4 and 5. Printing is performed on one of the front and back sheet materials 4 and 5, for example, the surface of the back sheet material 5.

FIG. 1 is a plan view showing the antenna module M, and FIG. 2 is a side view thereof. As shown in FIG. 5, the spacer core 1 is made of polycarbonate having a thickness of 0.5 mm. Since the spacer core 1 needs to have heat resistance to some extent, it may be formed of polyethylene terephthalate. A notch 8 is formed on one side of the spacer core 1, and the IC module 2 is arranged in the notch 8. By forming the notch hole 8 in a circular or elliptical shape instead of a quadrangular shape, the bending resistance of the card K can be improved.

The antenna coil 3 wound around the outer peripheral surface of the spacer core 1 is a φ0.12 urethane wire, and is wound around the outer peripheral surface of the spacer core 1 for 50 turns. As the antenna coil 3, a round wire of φ0.12 or a rectangular wire may be used.

The IC module 2 and the antenna coil 3 are connected by soldering via lead-in wires 9 and lead-out wires 10. The lead-in line 9 and the lead-out line 10 are wired so as to project to the front sheet 5 side which does not need to be printed after carding when drawn in from the outside to the inside or drawn from the inside to the outside. The wiring of the lead-in line 6 and the lead-out line 10 enables good printing while avoiding the influence of the lead-in line 9 and the lead-out line 10 at the time of printing after card formation.

When printing on both sides of the front and back sheets 4 and 5 after card formation, the surface on which flatness is particularly required (generally, sublimation type printing using a thermal head is important for flatness of the surface). The lead-in line 6 and the lead-out line 10 are wired on the surface opposite to the (a) side.

The antenna coil 3 is a spacer core 1
Is wound around the outer peripheral surface of the back sheet 5 so as to be lower than the surface of the back sheet 5 to be printed. As a result, the distance between the printed surface sheet 4 and the antenna coil 3 becomes long after the card is formed, and the influence of the metal wire forming the antenna coil 3 can be avoided during printing. Therefore, good printing without uneven printing is possible.

FIG. 6 is a side sectional view showing the winding jig 15 of the antenna coil 3, and FIG. 7 is a front view thereof. Winding jig 1
Reference numeral 5 denotes a pair of rotary plates 1 which are movable in directions of coming and going from each other
Rotating shafts 18 and 19 are connected to the central portions of the rotating plates 16 and 17, respectively. Recesses 16a, 17a having a rectangular shape and a depth dimension smaller than the width dimension of the spacer core 1 are formed on the facing surfaces of the pair of rotary plates 16, 17, and the spacer core 1 is formed in the recess portions 16a, 17a.
Are fitted and held. At this time, a gap 20 for inserting a metal wire is formed between the pair of rotary plates 16 and 17.

The pair of rotary plates 16 and 17 are moved and rotated in a direction in which they come into contact with and separate from each other by a drive mechanism (not shown). 8 to 11 show a method of manufacturing the antenna module M by integrating the antenna coil 3 on the outer peripheral portion of the spacer core 1.

First, as shown in FIG. 8, a pair of rotating plates 1
The drive mechanisms 6 and 17 are moved in the directions away from each other. After that, as shown in FIG. 9, the spacer core 1 is fitted and held in the recess 16 a of the one rotating body 16.
Then, as shown in FIG.
Are moved toward each other to hold the spacer core 1 in a sandwiched state.

After the spacer core 1 is held in the compressed state as described above, a round wire or a rectangular wire is pulled out from a wire supply portion (not shown), and one end of the wire is connected to the pair of rotating bodies 1.
It is inserted into the gap 20 between 6 and 17 and fixed to the spacer core 1. As shown in FIG. 11, when the rotary shafts 18 and 19 are rotated from this state, the wire is pulled out and wound around the outer peripheral portion of the spacer core 1 to form the antenna coil 3. After the antenna coil 3 is formed in this way, as shown in FIG.
The antenna module M including the spacer core 1 and the antenna coil 3 integrated with the spacer core 1 is removed from the recessed portion 16 a of the rotating body 16 by moving 7 in the separating direction.

When the antenna coil 3 is formed by using the rectangular wire, the density of the wire can be increased as compared with the case of the round wire, so that the antenna module M can be downsized.

13 and 14 show the second embodiment of the present invention. That is, in the second embodiment, the positioning sheet 25 having an outer dimension larger than the spacer core 1 by the amount of the antenna coil 3 is previously integrated on one surface side of the spacer core 1. The opening 2 is formed in the portion of the positioning sheet 25 facing the IC module 2.
5a is formed.

According to this embodiment, the antenna coil 3 is wound as a single body, fitted in the spacer core 1 in a later step, and the spacer core 1 and the antenna coil 3 are partially or wholly bonded and integrated. In the case where the antenna coil 3 is formed into a card after that, the antenna coil 3 is positioned by the positioning sheet 12, does not jump out to the surface side of the spacer core 1, and printing unevenness due to the influence of the metal wire forming the antenna can be eliminated.

The spacer core 1 may be a substrate such as glass epoxy instead of a resin such as PC or PET, and may have electrical wiring or electronic parts (LSI, capacitors, etc.) mounted thereon. At this time as well, the antenna coil 3 is similarly provided on the outer circumference.
When it was wound and integrated, the printing after card formation was good.

[0028]

As described above, according to the present invention, since the antenna coil is formed by winding the metal wire around the outer peripheral surface of the card core, the card according to claims 1, 3, 4, and 7 The antenna module can be configured by integrating the core and the antenna coil. Therefore, the antenna coil can be automatically incorporated in the card without being deformed, the manufacturing efficiency can be improved, and the size does not increase.

According to the third aspect of the present invention, since the antenna coil is formed by winding the metal wire around the outer peripheral surface of the card core so as to be lower than the surface holding the printing surface, the antenna coil is printed. Since it can be separated from the surface, good printing can be performed while avoiding the influence of the metal wire rod during printing.

According to the fourth aspect of the present invention, the lead-in wire is arranged so as to project toward the surface of the card core opposite to the surface on which the printing surface is held. Therefore, the influence of the lead-in wire during printing is avoided. And good printing becomes possible.

According to a fifth aspect of the present invention, a positioning sheet having an outer dimension larger than that of the card core is provided on the surface of the card core that holds the printing surface, and the outer peripheral edge of the positioning sheet is outside the card core. Since it is projected outward from the peripheral portion, the antenna coil mounted on the card core is positioned so as not to project to the surface of the card core on the side holding the printed surface. Therefore, at the time of printing, good printing can be performed while avoiding the influence of the metal wire rod.

[Brief description of drawings]

FIG. 1 is a plan view showing an antenna module according to an embodiment of the present invention.

FIG. 2 is a side view showing the antenna module.

FIG. 3 is a plan view showing a wireless card.

FIG. 4 is a side sectional view showing a wireless card.

FIG. 5 is a plan view showing a spacer core.

FIG. 6 is a side sectional view showing a winding jig.

FIG. 7 is a front view showing a winding jig.

FIG. 8 is a diagram showing a winding operation of an antenna coil with respect to a spacer core.

FIG. 9 is a diagram showing a winding operation of an antenna coil with respect to a spacer core.

FIG. 10 is a diagram showing a winding operation of an antenna coil with respect to a spacer core.

FIG. 11 is a diagram showing a winding operation of the antenna coil with respect to the spacer core.

FIG. 12 is a diagram showing a winding operation of an antenna coil with respect to a spacer core.

FIG. 13 is a plan view showing a spacer core according to a second embodiment of the present invention.

FIG. 14 is a side view showing a spacer core.

[Explanation of symbols]

 2 ... IC module (electronic component) 1 ... Spacer core (card core) 3 ... Antenna coil

Claims (8)

[Claims] 1. A card core to which an electronic component is attached, and an antenna coil which is formed by winding a metal wire around the outer peripheral surface of the card core and is connected to the electronic component. Antenna module for card. 2. The antenna module for a card according to claim 1, wherein the card core is formed with a substantially circular notch for accommodating an electronic component. 3. A card core for mounting an electronic component and holding a printing surface on at least one surface side, and a metal wire rod lower than the surface on the side holding the printing surface on the outer peripheral surface of the card core. An antenna coil, which is formed by winding and is connected to the electronic component, and a card antenna module. 4. A card core having an electronic component attached thereto, a printing surface being held on at least one side, and a metal wire rod wound around an outer peripheral surface of the card core. An antenna coil connected via the lead wire, wherein the lead-in wire is wired in a state of protruding in a surface direction opposite to a surface of the card core on which a printed surface is held. Antenna module for card. 5. A card core for mounting an electronic component and holding a printing surface on at least one side, and a card core provided on a side of the card core on which the printing surface is held, and having an outer dimension larger than that of the card core. And a positioning sheet having an outer peripheral edge portion protruding outward from the outer peripheral edge portion of the card core, and an outer peripheral surface portion of the card core that does not protrude in the surface direction on the side where the printing surface of the card core is held by the positioning sheet. An antenna coil for a card, which is positioned and mounted as described above, and which is connected to the electronic component. 6. The antenna module for a card according to claim 5, wherein the positioning sheet has an opening at a portion facing the electronic component. 7. A holding step of holding a card core with a pair of holding members while holding the card core from both sides thereof, and rotating the card core held with the holding force by the holding step, whereby a metal wire rod is formed on the outer peripheral surface of the card core. And a winding step of forming an antenna coil by winding, and after the antenna coil is formed by this winding step,
And a step of taking out the card core and the antenna coil integrated with the card core from the holding member. 8. The method of manufacturing an antenna module for a card according to claim 7, wherein a rectangular wire is used as the metal wire material.