Card type wireless device, antenna coil, and method for manufacturing communication module
First Claim
Patent Images
1. An antenna coil comprising:
- an air-core type flat coil body having a thickness in an axial direction of the coil body;
a coil case made of resin; and
a reinforce frame, wherein the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, the coil case has a ring shape, which corresponds to the coil body, the coil case includes a coil accommodation space for accommodating the coil body, the coil accommodation space is disposed in a circumferential direction of the ring shape of the coil case, the coil case further includes a coil side terminal for mounting the coil body on a substrate with a solder member, the reinforce frame is integrated with the coil case along with the circumferential direction of the ring shape of the coil case, and the reinforce frame is made of a material having a Young'"'"' modulus higher than that of the resin of the coil case.
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Abstract
An antenna coil includes: an air-core type flat coil body; a coil case; and a reinforce frame. The coil case has a ring shape, which corresponds to the coil body. The coil case includes a coil accommodation space. The coil case further includes a coil side terminal. The reinforce frame is integrated with the coil case along with the circumferential direction of the ring shape of the coil case. The reinforce frame is made of a material having a Young'"'"' modulus higher than that of the resin of the coil case.
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Citations
19 Claims
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1. An antenna coil comprising:
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an air-core type flat coil body having a thickness in an axial direction of the coil body;
a coil case made of resin; and
a reinforce frame, wherein the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, the coil case has a ring shape, which corresponds to the coil body, the coil case includes a coil accommodation space for accommodating the coil body, the coil accommodation space is disposed in a circumferential direction of the ring shape of the coil case, the coil case further includes a coil side terminal for mounting the coil body on a substrate with a solder member, the reinforce frame is integrated with the coil case along with the circumferential direction of the ring shape of the coil case, and the reinforce frame is made of a material having a Young'"'"' modulus higher than that of the resin of the coil case. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for manufacturing a communication module having an antenna coil and a transmitting/receiving circuit, which are mounted on a substrate, wherein the antenna coil is connected to the transmitting/receiving circuit, the method comprising the steps of:
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positioning a coil side terminal of the antenna coil together with a solder member for connecting between a substrate side terminal of the substrate and the coil side terminal of the antenna coil; and
heating the substrate together with the antenna coil in a solder reflow furnace so that the solder member is melted and soldered between the coil side terminal and the substrate side terminal, wherein the antenna coil further includes;
an air-core type flat coil body having a thickness in an axial direction of the coil body;
a coil case made of resin; and
a reinforce frame, the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, the coil case has a ring shape, which corresponds to the coil body, the coil case includes a coil accommodation space for accommodating the coil body, the coil accommodation space is disposed in a circumferential direction of the ring shape of the coil case, the coil case further includes a coil side terminal for mounting the coil body on a substrate with a solder member, the reinforce frame is integrated with the coil case along with the circumferential direction of the ring shape of the coil case, and the reinforce frame is made of a material having a Young'"'"' modulus higher than that of the resin of the coil case.
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19. A card type wireless device comprising:
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a communication module having an antenna coil, a transmitting/receiving circuit connecting to the antenna coil, and a substrate; and
a card type casing, wherein the antenna coil includes;
an air-core type flat coil body having a thickness in an axial direction of the coil body;
a coil case made of resin; and
a reinforce frame, the thickness of the coil body is smaller than a radius of a circle, an area of which is equal to an area of a region surrounded with an outline of a projected coil body, the projected coil body provided by projecting the coil body on a projection plane perpendicular to the axial direction of the coil body, the coil case has a ring shape, which corresponds to the coil body, the coil case includes a coil accommodation space for accommodating the coil body, the coil accommodation space is disposed in a circumferential direction of the ring shape of the coil case, the coil case further includes a coil side terminal for mounting the coil body on a substrate with a solder member, the reinforce frame is integrated with the coil case along with the circumferential direction of the ring shape of the coil case, the reinforce frame is made of a material having a Young'"'"' modulus higher than that of the resin of the coil case, the antenna coil and the transmitting/receiving circuit are mounted on the substrate, the coil body includes an axis, which coincides with a normal line of the substrate, and the card type casing accommodates the communication module in such a manner that a thickness direction of the substrate coincides with a thickness direction of the card type casing.
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Specification