Electronic apparatus

Patent metadata

Field	Value
Publication number	US-9781236-B2
Application number	US-201414911082-A
Country	US
Kind code	B2
Filing date	Aug 6, 2014
Priority date	Aug 28, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

An electronic apparatus uses a smaller, thinner antenna module that does not have impairing communication characteristics and can also be mounted in a more narrow space. The electronic apparatus is provided with an antenna module including an antenna coil wound in a planar shape and a magnetic sheet overlapping at least a portion of the antenna coil. The antenna coil is bent, and from the bent portion, a plane that includes one side of the antenna coil on which current flows in one direction is disposed alongside a lateral face of an internal structure of a casing, and a plane that includes another side of the antenna coil on which current flows in the opposite direction than on the one side is disposed to overlap the magnetic sheet. The magnetic sheet is disposed at a position farther from a reader/writer than the other side of the antenna coil is.

First claim

The invention claimed is:

1. An electronic apparatus comprising:
an antenna device incorporated into the electronic apparatus and configured to communicate with an external device via an electromagnetic field signal, the antenna device comprising a loop coil wound in a planar shape and a magnetic sheet formed from a magnetic material and overlapping at least a portion of the loop coil,
wherein the loop coil includes a bend, and from a position of the bend, a plane that includes one side of the loop coil on which current flows in one direction is disposed alongside a lateral face of an internal structure disposed inside a casing, and a plane that includes another side of the loop coil on which current flows in the opposite direction than on the one side is disposed to overlap the magnetic sheet, and
wherein the magnetic sheet is disposed at a position farther from the external device than the another side of the loop coil is,
of the one side and the another side of the loop coil, only the one side of the loop coil is disposed near to and is disposed so as to face the lateral face of the internal structure, and
the another side of the loop coil is extended from the position of the bend away from the internal structure.

2. The electronic apparatus of claim 1 , wherein a portion or all of the internal structure is a metallic body.

3. The electronic apparatus of claim 1 , wherein the another side of the loop coil is bent at a predetermined angle from a plane facing the external device.

4. The electronic apparatus of claim 2 , wherein the another side of the loop coil is bent at a predetermined angle from a plane facing the external device.

5. The electronic apparatus of claim 1 , wherein the another side of the loop coil is arranged so as to face the casing.

Assignees

• Dexerials Corp

Inventors

• Orihara Katsuhisa
• Kobo Masahiro

Classifications

• H04M1/026 Primary

  Details of the structure or mounting of specific components · CPC title

• H01Q7/06 Primary

  with core of ferromagnetic material (H01Q7/02 takes precedence) · CPC title

• H01Q1/2216

  used in interrogator/reader equipment · CPC title

• H01Q1/243

  with built-in antennas · CPC title