JP5905797B2 - Mobile device - Google Patents

Description

  The present invention relates to a portable terminal such as a mobile phone having a rechargeable battery, and more particularly to heat dissipation around the rechargeable battery.

  A portable terminal having a rechargeable battery and a main board inside a casing is known. For example, in patent document 1, it accommodates in order of a liquid crystal display, a main board | substrate, a rechargeable battery, and a battery cover.

JP 2012-100033 A

  However, in the conventional portable terminal, since the rechargeable battery is disposed on the back side of the main board, the rechargeable battery cannot be widened when the peripheral edge of the battery cover is rounded and curved. It was.

  Therefore, in recent years, there is a need to attach a rechargeable battery to the back side of a metal frame of a cabinet that accommodates a liquid crystal display and arrange the rechargeable battery at the center in the thickness direction so that the width is as large as possible.

  In this case, since the main board | substrate with a heat generation source is arrange | positioned in the back side of a rechargeable battery, there existed a problem that the heat of a rechargeable battery or a main board | substrate was hard to radiate. Moreover, when the rechargeable battery swells, there is a risk of pressing the main board having precision parts.

  The present invention has been made in view of such a point, and an object of the present invention is to dissipate heat from the rechargeable battery disposed on the back side of the metal frame and to allow some swelling of the rechargeable battery. It is in.

  In order to achieve the above object, the present invention secures a space with a double-sided tape.

Specifically, in the first invention,
A front cabinet having a metal frame;
A main board disposed on the back side of the front side cabinet;
A rectangular plate-shaped rechargeable battery disposed between the metal frame and the main board;
A double-sided tape that is affixed to both sides of the front surface of the rechargeable battery with a space therebetween and that is affixed to the back surface of the metal frame to secure a heat radiation space between the front surface of the rechargeable battery and the back surface of the metal frame. I have.

  According to said structure, the space for radiating the heat | fever which generate | occur | produced with the rechargeable battery by the double-sided tape which stuck the space | interval between the back surface of the metal frame and the front surface of the rechargeable battery on both sides in the width direction of the rechargeable battery. Because it is provided, heat is hard to stay. In addition, a gap is formed between the rechargeable battery and the metal frame, and the rechargeable battery can be prevented from expanding and being pressed against the main board.

In particular, in the first invention,
A heat diffusion sheet for diffusing heat is disposed in the heat dissipation space.

  According to said structure, the heat of a rechargeable battery is spread | diffused by a thermal diffusion sheet, and is efficiently transmitted to a metal frame.

In the second invention, in the first invention,
A thermal diffusion sheet is also disposed between the back surface of the rechargeable battery and the main substrate.

  According to the above configuration, since heat is diffused between the rechargeable battery and the main substrate having the heat generation source, the heat is diffused inside the portable terminal and the heat does not accumulate in part.

In the third invention, in the second invention,
The heat diffusion sheet on the front side and the heat diffusion sheet on the back side of the rechargeable battery are connected by a heat conductive member.

  According to said structure, the heat | fever generate | occur | produced around the main board | substrate is also transmitted to the front side of a rechargeable battery via a heat conductive member, and it becomes difficult to heat up part of a portable terminal.

In the fourth invention, in any one of the first to third inventions,
The heat diffusion sheet is attached to a bellows-like or embossed member.

  According to said structure, by a bellows structure or embossing, a surface area is expanded and heat conduction and a thermal convection are improved.

As described above, according to the present invention, the space generated by adhering the front surface of the rechargeable battery and the back surface of the metal frame with the double-sided tape can dissipate heat generated by the rechargeable battery, and the rechargeable battery. Some bulges are acceptable. In particular, the heat of the rechargeable battery can be efficiently transmitted to the metal frame while the heat is diffused by the heat diffusion sheet.

FIG. 3 is an enlarged cross-sectional view taken along line II in FIG. 2. It is the perspective view which looked at the mobile telephone from the front side. It is the disassembled perspective view which looked at the mobile telephone from the front side. It is the disassembled perspective view which looked at the mobile telephone from the back side. It is the VV line expanded cross section of FIG.

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

  1 to 4 show a mobile phone 1 as a mobile terminal according to an embodiment of the present invention. The mobile phone 1 includes a front-side cabinet 3 into which a display unit 2 is fitted on the front side. The back side of the front cabinet 3 is covered with a back cabinet 4, and the back is covered with a rear cover 5.

  As shown in FIG. 1, the front cabinet 3 has a rectangular dish-shaped metal frame 6 inserted in the center. The metal frame 6 is made of a sheet metal such as a stainless steel plate, an aluminum alloy, or a magnesium alloy, or a molded product. The display unit 2 is accommodated on the front side of the metal frame 6. A rechargeable battery 7 having a rectangular plate shape that is long in the vertical direction is attached to the back side of the metal frame 6. A main substrate 8 is accommodated on the back side of the rechargeable battery 7.

  As a feature of the present invention, a pair of double-sided tapes 9 are attached to the left and right ends of the rechargeable battery 7. Although not shown, the double-sided tape 9 has a thick layer such as a foamed layer, and the thickness is, for example, 0.2 mm. For this reason, a heat radiation space 10 is formed between the front surface of the rechargeable battery 7 and the back surface of the metal frame 6. A first heat diffusion sheet 11 is disposed in the heat dissipation space 10. The first heat diffusion sheet 11 is made of, for example, a graphite sheet. Since this graphite sheet is affixed to the member bent in the shape of a bellows, the surface area is increased. In addition, you may affix the 1st heat diffusion sheet 11 on the member which carried out the embossing.

  A second heat diffusion sheet 12 made of the same material as the first heat diffusion sheet 11 is also disposed between the rechargeable battery 7 and the main substrate 8. For example, since the second heat diffusion sheet 12 is disposed in front of the main substrate 8 having many heat generation sources such as a CPU, the width may be larger than that of the first heat diffusion sheet 11. As shown in FIG. 5, the second heat diffusion sheet 12 and the first heat diffusion sheet 11 are connected by a connecting member 13 made of a heat conducting member such as a graphite sheet at the lower end of each other.

  Thus, since the 1st heat diffusion sheet 11 which increased the surface area by the bellows structure was provided in the heat dissipation space 10 which affixed the front surface of the rechargeable battery 7 to the back surface of the metal frame 6 with the double-sided tape 9, heat conduction and heat The convection is improved and the heat of the rechargeable battery 7 can be efficiently dissipated, and the heat is transferred to the metal frame 6 having a large surface area and easily dissipated to the outside. In addition, since the second heat diffusion sheet 12 is provided on the back side of the rechargeable battery 7, heat is not accumulated on the main substrate 8 side having a large heat source such as a CPU. In addition, since the first heat diffusion sheet 11 and the second heat diffusion sheet 12 are connected by the connecting member 13 at the lower end portion, the heat generated in the main board 8 can be transmitted to the metal frame 6 side. As a result, the heat generated in the main substrate 8 is diffused throughout the mobile phone 1, so that heat does not accumulate and does not cause discomfort to the user.

  In addition, since the heat dissipation space 10 is secured, the main substrate 8 on which the precision components are densely packed is not damaged even if the rechargeable battery 7 swells somewhat compared to the case where the rechargeable battery 7 is directly bonded to the metal frame 6.

  Therefore, according to the mobile terminal according to the present embodiment, the heat generated in the rechargeable battery 7 can be radiated and a slight swelling of the rechargeable battery 7 can be allowed.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the connection member 13 was provided in the lower end, it is not limited to this, What is necessary is just to utilize vacant spaces, such as an upper end.

  In the above embodiment, the metal frame 6 is insert-molded into the resin-made front-side cabinet 3, but a separate metal frame 6 may be assembled to the resin-made frame, and the entire front-side cabinet 3 is composed of a metal-molded product. May be.

  In the said embodiment, although the double-sided tape 9 was affixed on both the right and left sides of the rechargeable battery 7, you may affix also on the up-and-down both sides.

  In the above embodiment, the mobile terminal is a mobile phone, but is a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistant), a smartphone, a personal computer, a mobile tool, an electronic dictionary, a calculator, a game machine, or the like. May be.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

  As described above, the present invention is useful for a mobile terminal such as a mobile phone having a rechargeable battery.

1 Mobile phone (mobile terminal)
2 display section
3 Front side cabinet
4 Rear cabinet
5 Rear cover
6 Metal frame
7 Rechargeable battery
8 Main board
9 Double-sided tape
10 Heat dissipation space
11 First heat diffusion sheet
12 Second heat diffusion sheet
13 Connecting member (heat conduction member)

Claims (4)

A front cabinet having a metal frame;
A main board disposed on the back side of the front side cabinet;
A rectangular plate-shaped rechargeable battery disposed between the metal frame and the main board;
A double-sided tape that is affixed to both sides of the front surface of the rechargeable battery with a space therebetween and that is affixed to the back surface of the metal frame to secure a heat radiation space between the front surface of the rechargeable battery and the back surface of the metal frame. equipped and,
A portable terminal, wherein a heat diffusion sheet for diffusing heat is disposed in the heat radiation space . The mobile terminal according to claim 1 ,
A portable terminal, wherein a thermal diffusion sheet is also disposed between the back surface of the rechargeable battery and the main substrate. The mobile terminal according to claim 2 ,
A portable terminal comprising a heat diffusion sheet on the front side and a heat diffusion sheet on the back side of the rechargeable battery connected by a heat conductive member. In the portable terminal as described in any one of Claim 1 to 3 ,
A portable terminal, wherein the heat diffusion sheet is attached to a bellows-like or embossed member.

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