WO2013018553A1

WO2013018553A1 - Mobile electronic device

Info

Publication number: WO2013018553A1
Application number: PCT/JP2012/068325
Authority: WO
Inventors: 龍行新谷; 道生永井; 英路村松
Original assignee: 日本電気株式会社
Priority date: 2011-07-29
Filing date: 2012-07-19
Publication date: 2013-02-07
Also published as: JPWO2013018553A1

Abstract

A mobile electronic device (1) having a battery (6) and a circuit substrate (7) housed inside a case, wherein the case includes a no-grip area (1b) that is not gripped during use and a grip area (1a) that is the section other than the non-grip area (1b). The circuit substrate (7) is arranged in the non-grip area (1b). The non-grip area (1b) is an area positioned at the top when the mobile electronic device (1) is being used. At least part of the battery (6) is in the grip area (1a). A heat-insulation space is provided between the battery (6) and the circuit substrate (7).

Description

Portable electronic devices

The present invention relates to a portable electronic device.

In recent years, portable electronic devices such as mobile phones and so-called tablet information terminals larger than mobile phones have become widespread. Since such portable electronic devices are being made thinner and lighter, a large number of components are housed in a casing at high density.

The parts housed in the casing of the portable electronic device include parts that generate heat. Therefore, in Patent Document 1, a wavy contour is formed in a part of the housing so that the outer surface of the electronic device functions as a heat sink to dissipate heat. Moreover, in patent document 2, the heat conductive member is affixed inside the housing | casing, and the heat transmitted from the heat-emitting component is diffused effectively in the upper housing | casing by this heat conductive member, and is released.

Special table 2010-507243 JP 2005-150668 A

As in

Patent Documents

1 and 2, measures against heat generation of components housed in portable electronic devices have been considered, but sufficient effects have not been obtained, and further heat generation measures are required. In particular, in

Patent Documents

1 and 2, since heat is radiated from the outer surface of the electronic device or the upper housing, the user feels heat when touching the heat radiating portion. As described above, the inventions described in

Patent Documents

1 and 2 are a very effective measure against causing the user to feel the heat because the temperature of the portable electronic device becomes too high due to the heat generated by the internal components. Not. Moreover, almost no heat generation measures are taken in consideration of the type of the heat generating component itself.

Accordingly, an object of the present invention is to provide a portable electronic device that solves the above-described problems and can prevent the user from feeling heat due to heat generated from components housed therein.

A portable electronic device according to the present invention includes a housing that includes a non-gripping region that is not gripped during use and a gripping region that is a portion other than the non-gripping region, a battery that is housed in the housing, and a housing that is housed in the housing. And a circuit board disposed in the non-gripping region. The non-gripping region is a region located at the top when the portable electronic device is used. At least a portion of the battery may be located in the gripping area. And it is preferable that the heat insulation space is provided between the battery and the circuit board.

Another portable electronic device according to the present invention includes a housing including a non-gripping region whose surface is not gripped by a user during use and a gripping region that is a portion other than the non-gripping region, and is housed in the housing and at least during use. A first heating element and a second heating element that generate heat, wherein the first heating element is disposed closer to the non-gripping region than the gripping region; Have. At least a part of the second heating element may be located in the gripping area. It is preferable that a heat insulating space is provided between the first heating element and the second heating element.

According to the present invention, even when one heating element, for example, a circuit board, generates heat when the portable electronic device is used, heat is not directly transmitted to the user holding the portable electronic device, and the user is heated. It is hard to let you feel.

(A) is the surface side perspective view of one Embodiment of the portable electronic device of this invention, (b) is the back surface side perspective view, (c) is the side view. It is a top view of the portable electronic device shown in FIG. It is explanatory drawing which shows the use condition of the portable electronic device shown to FIG. It is side surface sectional drawing of the portable electronic device shown to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1A to 1C show a tablet information terminal 1 which is an embodiment of the portable electronic device of the present invention. Although this tablet type information terminal 1 is larger than a general mobile phone, it is a small and lightweight device that can be operated by a user and is composed of a front cover 2 and a rear cover 3. This is a configuration in which various parts are housed in a housing. A touch panel 4 having a rectangular planar shape is disposed on one surface (front surface) of the tablet information terminal 1, and the periphery of the touch panel 4 is surrounded by the front cover 2. The touch panel 4 of the present embodiment is composed of, for example, a liquid crystal display device having a size of 7 inches (a diagonal line having a square of 7 inches = 17.78 cm) and a transparent screen such as glass covering the liquid crystal display device. The other surface (back surface) of the tablet information terminal 1 is mainly constituted by the rear cover 3, and the lens 5 a of the built-in camera 5 and the camera photographing light 11 are exposed from a part of the rear cover 3. The rear cover 3 is generally curved, and has protruding

convex side portions

3a, 3c and a concave center portion 3b sandwiched between the

side portions

3a, 3c along the longitudinal direction of the tablet information terminal 1. . However, in the present invention, the rear cover 3 is not necessarily curved.

The user usually holds the rear cover 3 of the tablet information terminal 1 with one hand and touches the touch panel 4 with the finger of the other hand to operate.

The inside of the case of the tablet information terminal 1 is schematically shown in FIG. A rechargeable battery (battery) 6 and a circuit board 7 are arranged in a plane in the casing. A speaker 8, a vibrator 9, and one end of an antenna 10 are arranged at the end of the case on the rechargeable battery 6 side. At the end of the housing on the side of the circuit board 7, the built-in camera 5, camera shooting light 11, earphone jack 12, slide key 13 used for volume adjustment, USB terminal 14, card slot 15 16 and a charging terminal 17 are arranged. These are all connected to the circuit board 7. Examples of card slots include a SIM (Subscriber Identity Module) card slot 15 and an SD (Secure Digital) card slot 16. These are all connected to the circuit board 7.

When a charger (not shown) is connected to the charging terminal 17, electric power is stored in the rechargeable battery 6 from the charging terminal 17 through the circuit board 7. A communication IC card (SIM card) supplied from a telecommunications carrier is inserted into the SIM card slot 15 and performs wireless communication with an external device via the antenna 10. Sound generation from an earphone (not shown) connected to the speaker 8 or the earphone jack 12 and volume adjustment by a slide key 13 can be performed. The vibration by the vibrator 9 can also be generated in synchronization with the sound generation or independently of the sound generation. The built-in camera 5 can shoot, and the user can turn on / off the camera shooting light 11 as necessary. Furthermore, various data (audio data, image data, telephone number, mail address, etc.) are stored in an SD card (not shown) inserted into the SD card slot 15 or a USB memory (not shown) connected to the USB terminal 14. Can do. These various functions are executed and controlled by various electric components (not shown) mounted on the circuit board 7 in the same manner as known electronic devices.

Many of the electrical components (for example, CPU: central processing unit) mounted on the circuit board 7 generate heat during operation. Therefore, the circuit board 7 including such an electrical component itself is a heating element (first heating element). Is considered. On the other hand, the rechargeable battery 6 is a heating element (second heating element) that generates heat when electric power is stored from the charging terminal 17 via the circuit board 7. That is, the tablet type information terminal 1 has two types of heat generating components, that is, a rechargeable battery 6 and a circuit board 7.

In the configuration of a conventional portable electronic device so far, a large circuit board extending almost all over the inside of the housing is arranged, and a rechargeable battery is placed so as to overlap this circuit board. In that case, since the two types of heat generating components overlap, there is no escape space for heat, and heat from both heat generating components is added to raise the temperature.

On the other hand, in the present invention, the rechargeable battery 6 and the circuit board 7 are arranged apart from each other when seen in a plan view. As described above, the circuit board 7 is arranged on one end side in the housing.

The tablet-type information terminal 1 of the present embodiment is normally used in a state where the tablet-type information terminal 1 is arranged vertically as shown schematically in FIG. 3 and the user holds the lower part. At the time of such use, the upper and lower sides of the tablet-type information terminal 1 are generally determined by the display contents displayed on the touch panel 4 and by logos and characters formed on the housing. Therefore, the upper and lower sides of the tablet information terminal 1 in use are constant, and the upper and lower sides do not reverse each time they are used. In the normal use, as shown in FIG. 3, the user holds the lower part of the tablet information terminal 1, so the portion held by the user is substantially constant, and is not held by the user in the normal use. There is also a part. That is, the tablet-type information terminal 1 used in this manner roughly includes a gripping area 1a in which the user may grip the surface of the casing when used, and a gripping surface that is normally gripped when used. There is a non-gripping region 1b that is not performed. The non-grip region 1b is a region located at the top when the tablet information terminal 1 is used. In the present invention, the circuit board 7 is disposed in the non-gripping region 1a. On the other hand, the rechargeable battery 6 may be located in the non-grip region 1b in the grip region 1a. Explaining this point, the circuit board 7 generates heat mainly when the tablet information terminal 1 is used, that is, when the user is holding the holding area 1a. Therefore, by arranging the circuit board 7 in the non-grip region 1b where the user's hand is less likely to touch when using the tablet information terminal 1, the user can be heated even if the circuit board 7 generates heat. It is not transmitted directly, making it difficult for the user to feel the heat. If the circuit board 7 is disposed at least near the non-grip region 1b rather than the grip region 1a, there is a certain effect in that it is difficult for the user to feel heat.

On the other hand, the rechargeable battery 6 generates heat mainly during charging. During charging, the tablet information terminal 1 is connected to a charger (not shown) and is held or left in the charger holder, so that the user does not often hold it by hand. Therefore, even if the rechargeable battery 6 is located in the gripping area 1a, it is unlikely that the user will feel heat when the heat is generated, so the rechargeable battery 6 is not gripped even if it is located in the gripping area 1a. It may be located in region 1b. Since the rechargeable battery 6 is relatively heavy among the various components housed in the housing, the tablet-type information terminal 1 is used in a vertically long arrangement as shown in FIG. There is a further advantage that the center of gravity is located at the bottom and stabilizes when the person grips the bottom.

The portion of the case of the tablet-type information terminal 1 that can be touched by the user's hand when gripping varies somewhat depending on the user's dominant hand and the size of the hand. However, even if the user's dominant hand and the size of the hand are somewhat different, an area where it is almost impossible to touch the user's hand when gripping is present mainly in the upper part of the housing. In this specification, such a region is referred to as a non-gripping region 1b, and the other part is referred to as a gripping region 1a. As described above, in the present invention, the circuit board 7 that generates heat mainly when the tablet type information terminal 1 is used is formed in the non-grip region 1b that is hardly touched when gripping regardless of the user's dominant hand or hand size. It is arranged. Thereby, even if the heat generation itself of the circuit board 7 cannot be suppressed, there is little possibility that the user feels heat.

In the present invention, the rechargeable battery 6 and the circuit board 7 are arranged apart from each other in plan view, and a heat insulating space S is provided between the rechargeable battery 6 and the circuit board 7. . According to this configuration, the heat generated by the circuit board 7 mainly when the portable electronic device is used is blocked to some extent by the heat insulating space S and is naturally cooled, and is not transmitted to the gripping area 1a. Even if the rechargeable battery 6 and the circuit board 7 generate heat at the same time, both heats are not added to each other, and are suppressed by the heat insulating space S, respectively, so that an increase in temperature is suppressed.

This application claims priority based on Japanese Patent Application No. 2011-167292 filed on July 29, 2011, the entire disclosure of which is incorporated herein.

1 Tablet information terminal (portable electronic device)

1a Gripping area

1b Non-gripping area 2 Front cover (housing)
3 Rear cover (housing)
4 Touch panel 6 Rechargeable battery (second heating element: battery)
7 Circuit board (first heating element)
S Insulation space

Claims

A housing including a non-gripping region that is not gripped during use and a gripping region that is a portion other than the non-gripping region;
A battery housed in the housing;
A circuit board housed in the housing and disposed in the non-gripping region;
A portable electronic device.
2. The portable electronic device according to claim 1, wherein the non-gripping region is a region located at an upper part when the portable electronic device is used.
The portable electronic device according to claim 1 or 2, wherein at least a part of the battery is located in the gripping region.
The portable electronic device according to any one of claims 1 to 3, wherein a heat insulating space is provided between the battery and the circuit board.
A housing including a non-gripping region where the surface is not gripped by the user during use, and a gripping region that is a portion other than the non-gripping region;
A first heating element and a second heating element that are housed in the housing and generate heat at least when used, wherein the first heating element is disposed closer to the non-gripping region than the gripping region. A first heating element and a second heating element;
A portable electronic device.
The portable electronic device according to claim 5, wherein at least a part of the second heating element is located in the gripping region.
The portable electronic device according to claim 5 or 6, wherein a heat insulating space is provided between the first heating element and the second heating element.