WO2013172037A1

WO2013172037A1 - Device subjected to wireless charging

Info

Publication number: WO2013172037A1
Application number: PCT/JP2013/003139
Authority: WO
Inventors: 洋明宮下
Original assignee: パナソニック株式会社
Priority date: 2012-05-18
Filing date: 2013-05-17
Publication date: 2013-11-21
Also published as: JP2013243813A

Abstract

A housing (31) has a surface. A coil (34) is disposed at the back of a part of the area on the surface. The expected range of the part of the area is a part or whole of an area (AR). The part of the area is processed so that a metal seal tends not to bond thereto. Any one of the following processing methods may be employed: A. The part of the area is formed as a projection (31a). B. The part of the area is rough and not smooth. C. The part of the area is raised with respect to the surrounding area. D. The part of the area is depressed with respect to the surrounding area. These processing methods facilitate the peeling off of a metal seal and thus prevent dielectric heating.

Description

Non-contact charged device

The present invention is related to a non-contact (wireless) charging device. More specifically, they are smartphones, mobile phones, portable navigation devices, and the like.

In recent years, non-contact charging devices are in circulation. The contactless charging system is composed of a terminal and a charging device. The terminal is composed of a charging coil and a casing. The function of the charging coil is electromotive force. The principle of electromotive force is electromagnetic induction. The charging coil is installed inside the housing. The back surface of the housing has a recess. The function of the recess is positioning described later. The position of the recess is coaxial with the center of the charging coil. On the other hand, the power supply coil and the device body constitute the charging device. The function of the power supply coil is excitation. The principle of excitation is electromagnetic induction. The power supply coil is provided in the apparatus main body. The surface of the apparatus main body has a convex portion. The position of the convex portion is coaxial with the center of the power supply coil. The function of the convex portion is positioning. That is, by making the insertion destination of the convex portion a concave portion, the position of the power supply coil is coaxial with the center of the charging coil. As a result, the charging efficiency is improved (see, for example, Patent Document 1 and Patent Document).

A metal decorative seal (hereinafter referred to as a metal seal) has been in circulation for a long time. Illustrative examples include a metal plate to which an adhesive material is attached and an aluminum seal. Generally, the metal seal is pasted on the back of the terminal.

メタル When the decorated terminal is contactlessly charged, the metal seal generates heat. The principle is so-called dielectric heating. The temperature reached by the metal seal is about 180 degrees. As a result, the portable device or the charging device is deformed.

Therefore, what is needed is a technique to prevent dielectric heating. The charging device is configured by a detection circuit and a control circuit. The function of the detection circuit is to detect metallic foreign matter. The function of the control circuit is to suppress charging. Charging is suppressed when a metallic foreign object is detected (see, for example, Patent Document 3 and Patent Document 4).

What is important in the above-mentioned known technology is how to improve the detection accuracy. However, even if the detection accuracy is improved, it is difficult to make the detection omission zero. Moreover, the time required for the temperature of the metal seal to reach about 180 degrees is about 3 seconds. In other words, what is important for preventing dielectric heating is how to prevent the metal seal from being applied.

JP 2008-141940 A JP 2008-236886 A International Publication No. 2012/002063 JP 2011-205819 A

It is a coil and a casing that constitute a non-contact charging device according to the present invention. A coil is disposed behind a part of the surface of the housing. The partial region or the vicinity thereof is processed so that it is difficult to attach a metal seal. The concepts involved in processing are molding and attachment. The criterion for determining the processing method is at least one of the following principles.

The condition that makes it difficult to apply the metal seal is that the adhesive strength is insufficient. Here, adhesion means to attract the metal seal and the housing to each other (intermolecular force). Since the contact area is small, the adhesive force is low.

The condition that makes it difficult to apply the metal seal is that the restoring force is greater than the adhesive strength. Here, restoration means that the state of the metal seal is changed from a bent state to a flat state.

¡Under these principles, it is adopted to make a partial region uneven, to make it rough and not smooth, to bend or project a partial region, etc.

The above explanation assumes that the principle of contactless charging is an electromagnetic induction method, but other methods such as a radio wave method and an electromagnetic resonance method are not excluded by the present invention.

A coil is placed behind a part of the housing surface. The said partial area | region is processed and it becomes difficult to stick a metal seal by it. That is, since the metal seal is hardly subjected to dielectric heating, deformation of the housing can be prevented.

FIG. 1 is a perspective view of a contactless charging system according to an embodiment of the present invention. FIG. 2 is a front view of the information processing apparatus according to the embodiment of the present invention. FIG. 3 is a rear view of the information processing apparatus according to the embodiment of the present invention. 4A is a cross-sectional view taken along line 4-4 of FIG. 2 as an example of the information processing apparatus according to the embodiment of the present invention. 4B is a cross-sectional view taken along the line 4-4 in FIG. 2 of an example of the information processing apparatus according to the embodiment of the present invention. 4C is a cross-sectional view taken along 4-4 in FIG. 2 of an example of the information processing apparatus according to the embodiment of the present invention. 4D is a cross-sectional view taken along 4-4 of FIG. 2 illustrating an example of the information processing apparatus according to the embodiment of the present invention.

FIG. 1 is a perspective view of a contactless charging system according to an embodiment of the present invention. The contactless charging system 10 includes a charger 20 and an information processing device 30. The charger 20 generates a magnetic force H. The information processing apparatus 30 receives the magnetic force H. As a result, the information processing apparatus 30 is contactlessly charged.

The detailed technical contents of the charger 20 are disclosed in International Publication No. 2012/002063, Japanese Unexamined Patent Application Publication No. 2011-205819, Japanese Unexamined Patent Application Publication No. 2012-39682, and Japanese Unexamined Patent Application Publication No. 2012-65537. These technical contents are incorporated as appropriate and are a part of the present specification.

FIG. 2 is a front view of the information processing apparatus 30 according to the present embodiment. FIG. 3 is a rear view of the information processing apparatus 30 according to the present embodiment. The information processing apparatus 30 mainly includes a casing 31, a screen 32, a battery 33, and a coil 34.

The casing 31 is made of resin and processed. Its function is storage. Each electronic component is housed.

The screen 32 is an electronic component. Its function is display. Various information is displayed. The screen 32 is arranged on the front surface of the housing 31. Examples of the screen 32 are a liquid crystal display and an organic EL display.

The battery 33 is an electronic component. Its function is power feeding. Each electronic component is supplied with power. The battery 33 is disposed inside the housing 31. At this time, the battery 33 can be removed. An example of the battery 33 is a lithium ion battery or the like.

The coil 34 is an electronic component. Its function is electromotive force. The condition for generating electromotive force is that the magnetic force H penetrates. A destination to which the coil 34 is connected is a battery 33. That is, when the magnetic force H penetrates, the battery 33 is charged. The coil 34 is disposed inside the housing 31. The area AR including the coil 34 will be described with reference to FIGS. 4A to 4D.

The contents of other ancillary technologies are disclosed in Japanese Unexamined Patent Application Publication Nos. 2008-141940 and 2008-236886. These technical contents are incorporated as appropriate and are a part of the present specification.

4A to 4D are cross-sectional views taken along the line 4-4 in FIG. 2 of the information processing apparatus according to the present embodiment. The housing 31 has a surface. The coil 34 is arranged behind the partial region of the surface. In the present embodiment, the assumed range of the partial area is a part or all of the area AR. The said partial area | region is processed and it becomes difficult to stick a metal seal (not shown) by it. The processing method is as follows.

FIG. 4A shows that the partial area protrudes. A preferred method for providing such a protrusion 31a is resin molding. Of course, the protrusion 31a may be attached separately. The protrusion 31a can also be referred to as a kind of unevenness. In the said embodiment, the protrusion 31a becomes a fulcrum, and the stuck metal seal bends. The bent metal seal is restored. Moreover, since the adhesion area is small, the adhesion force tends to be weakened. That is, since the metal seal is easily peeled off (it is difficult to stick), it is not dielectrically heated.

FIG. 4B shows that the partial area is rough and not smooth. A preferred method for providing such a rough surface 31b is so-called embossing. Of course, the method of attaching a coarse resin is not hindered. In the present embodiment, the bonding area between the rough surface 31b and the metal seal is relatively small. The comparison standard is an adhesion area between the smooth surface and the metal seal. That is, since the metal seal is easily peeled off (it is difficult to stick), it is not dielectrically heated.

FIG. 4C shows that the partial area is bent. In the embodiment, the partial area is raised more than the surrounding area. A preferred method for providing such a raised portion 31c is resin molding. The protruding metal portion 31c serves as a fulcrum, and the attached metal seal bends. The bent metal seal is restored. Moreover, since the adhesion area is small, the adhesion force tends to be weakened. That is, since the metal seal is easily peeled off (it is difficult to stick), it is not dielectrically heated.

FIG. 4D shows a bent portion of the partial area. In the embodiment, the partial region is recessed from the periphery. A preferred method for providing such a recess 31d is resin molding. In the embodiment, the adhesion area between the back surface of the housing 31 and the metal seal is relatively small. The comparison standard is an adhesion area when not recessed. That is, since the metal seal is easily peeled off (it is difficult to stick), it is not dielectrically heated.

The products for which the present invention can be used are devices that are contactlessly charged, and more specifically, are smartphones, mobile phones, portable navigation devices, and the like.

DESCRIPTION OF SYMBOLS 10 Non-contact charge system 20 Charger 30 Information processing apparatus 31 Case 31a Protrusion 31b Rough surface 31c Raised part 31d Depression 32 Screen 33 Battery 34 Coil

Claims

A device,
This device is contactless charged,
This device is composed of a coil and a housing,
The function of the coil is electromotive,
The housing has a surface, and a partial region of the surface has the coil disposed behind it,
In order to decorate this device, metallic decorative seals are in circulation,
The partial region or its vicinity is processed, and the purpose of the processing is to make it difficult to attach the decorative seal.
The apparatus of claim 1, comprising:
The shape of the partial region is uneven.
The apparatus of claim 1, comprising:
The partial area is rough and not smooth.
The apparatus of claim 1, comprising:
What the partial area has is a protrusion.
The apparatus of claim 1, comprising:
The partial area is bent.
The apparatus of claim 5, comprising:
The partial area is raised more than its surroundings.
The apparatus of claim 5, comprising:
The partial area is recessed from the periphery.
The apparatus of claim 1, comprising:
The partial region has one protrusion.
The apparatus of claim 1, comprising:
The partial area or its vicinity is embossed.
The device according to any one of claims 1 to 9,
Further configuring this device is a screen,
It is the front and the back that constitute the surface,
It is the front that the screen is arranged,
The partial area is provided on the back surface.