JP2014116748A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily radiate heat generated in a circuit board and easily remove a battery rechargeable battery.SOLUTION: A ground sheet 10 is stuck to a back surface of a sheet plate frame 6, a nonslip sheet 11 for suppressing a movement of a rechargeable battery 7, is stuck to the ground sheet 10 side of the rechargeable battery 7, and a press cushion 12 which can compress in a thickness direction of the rechargeable battery 7, is arranged between the rechargeable battery 7 and a circuit board 8. The ground sheet 10 is folded up to a back surface side of the rechargeable battery 7, and is sandwiched between the press cushion 12 and the circuit board 8.

Description

  The present invention relates to a portable terminal in which a rechargeable battery is accommodated between a display unit and a circuit board.

  Conventionally, in a mobile terminal represented by a mobile phone, in order to facilitate replacement of the rechargeable battery, the rechargeable battery is accommodated in the casing in the order of the display unit, the circuit board, and the rechargeable battery (see, for example, Patent Document 1). ).

JP 2012-100034 A

  In recent years, smart phones have been distributed, and the display portions of mobile terminals have become larger and the overall thickness has become thinner.

  On the other hand, there is a request to increase the size of the rechargeable battery in order to improve the holding time of the rechargeable battery. For this reason, it is conceivable that the rechargeable battery is accommodated in the order of the display unit, the rechargeable battery, and the circuit board for the purpose of arranging the rechargeable battery at the center in the thickness direction in the casing having the rounded side surface.

  In this case, since the rechargeable battery has a large mass, there is a risk of damaging a circuit board having a large number of precision parts when subjected to an impact such as dropping. In order to avoid this, it was necessary to firmly fix the rechargeable battery to the display unit side and the circuit board side with double-sided tape or the like. However, such a fixing method has a problem that heat generated by the circuit board is not sufficiently dissipated. Further, when firmly fixed with double-sided tape, there is a problem that the rechargeable battery is difficult to peel off at the time of repair or recycling.

  The present invention has been made in view of such points, and an object of the present invention is to make it easy to dissipate heat generated by a circuit board and to easily remove a rechargeable battery.

  In order to achieve the above object, in the present invention, the rechargeable battery is not firmly fixed with the double-sided tape, and both sides are covered with the heat transfer sheet.

Specifically, in the first invention,
A display unit;
A front-side cabinet that has a sheet metal frame and houses the display unit on the front side of the sheet metal frame;
A rechargeable battery disposed on the back side of the sheet metal frame;
A circuit board disposed on the back side of the rechargeable battery;
Coupled to the front cabinet, and a rear cabinet that houses the rechargeable battery and circuit board,
A heat transfer sheet is attached to the back of the sheet metal frame,
On the heat transfer sheet side of the rechargeable battery, a non-slip sheet for suppressing the movement of the rechargeable battery is attached,
Between the rechargeable battery and the circuit board, a pressure cushion that is compressible in the thickness direction of the rechargeable battery is disposed,
The heat transfer sheet is folded back to the back side of the rechargeable battery and is sandwiched between the pressing cushion and the circuit board.

  According to the above configuration, the rechargeable battery is pressed against the sheet metal frame by the pressure cushion on the back side of the rechargeable battery, and the non-slip sheet attached to the rechargeable battery suppresses the movement of the rechargeable battery. The battery does not move and damage to the circuit board is prevented. Since it is not necessary to fix a rechargeable battery with a double-sided tape etc., removal of a rechargeable battery becomes very easy. And since the heat | fever of a circuit board is transmitted to the sheet-metal frame side with a heat-transfer sheet | seat, it is prevented that a heat | fever accumulates and an unpleasant feeling is given to a user or a malfunction is generated.

  As described above, according to the present invention, the heat transfer sheet is attached to the back surface of the sheet metal frame, and the non-slip sheet for suppressing the movement of the rechargeable battery is attached to the heat transfer sheet side of the rechargeable battery. A pressure cushion that can be compressed in the thickness direction of the rechargeable battery is placed between the circuit board and a heat transfer sheet folded between the pressure cushion and the circuit board. This makes it easy to remove the rechargeable battery.

It is the II sectional view taken on the line of FIG. 2, and one part is expanded and shown. BRIEF DESCRIPTION OF THE DRAWINGS The mobile phone which concerns on embodiment of this invention is shown, (a) is the perspective view seen from the front, (b) is the perspective view seen from the back. It is the III-III sectional view taken on the line of FIG. 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.

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

  2A and 2B show the mobile phone 1 according to the embodiment of the present invention, in which FIG. 2A is a perspective view seen from the front, and FIG. 2B is a perspective view seen from the back. FIG. 1 is a cross-sectional view taken along the line II in FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is an exploded perspective view as seen from the front of the mobile phone 1, and FIG. 5 is an exploded perspective view as seen from the back of the mobile phone 1. The mobile phone 1 is a so-called smartphone and includes a display unit 2 (the display unit is indicated by a two-dot chain line) having a touch panel on the front side. The display unit 2 is accommodated in the front cabinet 3. A back side cabinet 4 is coupled to the back side of the front side cabinet 3 with screws or the like (not shown), and the back side is covered with a rear cover 5. A sheet metal frame 6 made of a stainless steel sheet or the like is insert-molded in the front cabinet 3. The display unit 2 is accommodated in a display accommodating portion 3a formed by the sheet metal frame 6 and the resin portion around the frame.

  A rectangular plate-shaped rechargeable battery 7 is arranged on the back side of the sheet metal frame 6. A circuit board 8 is disposed on the back side of the rechargeable battery 7, and the rechargeable battery 7 and the circuit board 8 are accommodated in a back side cabinet 4 coupled to the front side cabinet 3. The circuit board 8 is equipped with a large number of electronic components such as a CPU that serves as a heat source. The rechargeable battery 7 is composed of, for example, a lithium ion polymer secondary battery.

  A heat transfer sheet 10 including a material having a high heat transfer coefficient such as graphite powder is attached to the back surface of the sheet metal frame 6. Although not shown, the heat transfer sheet 10 is attached to the sheet metal frame 6 with a first double-sided tape.

  On the other hand, a rectangular anti-slip sheet 11 that suppresses the movement of the rechargeable battery 7 is attached to the heat transfer sheet 10 side (front side) of the rechargeable battery 7. The non-slip sheet 11 is made of a material having a large friction coefficient such as silicon rubber and is soft to some extent, and suppresses the rechargeable battery 7 from moving in the vertical and horizontal directions with respect to the heat transfer sheet 10 and deforms in the thickness direction. It is possible.

  In the present embodiment, for example, the rechargeable battery 7 is attached to the heat transfer sheet 10 with a belt-like second double-sided tape (not shown) only on the upper side. The portion where the heat transfer sheet 10 is attached to the rechargeable battery 7 does not have the first double-sided tape, and is not attached to the back surface of the sheet metal frame 6. In addition, this 2nd double-sided tape may affix not only the upper part of the rechargeable battery 7, but only the lower part, and may adhere slightly a wide range so that it can peel easily.

  Further, a pressure cushion 12 that is compressible in the thickness direction of the rechargeable battery 7 is disposed between the rechargeable battery 7 and the circuit board 8. Specifically, the press cushion 12 is made of, for example, frame-shaped sheet-like urethane with a center cut out.

  The heat transfer sheet 10 is extended upward from the adhesion portion with the sheet metal frame 6, and is folded back to the back side of the rechargeable battery 7. The heat transfer sheet 10 is sandwiched between the pressing cushion 12 and the circuit board 8 so as to wrap the rechargeable battery 7 from above. Since the pressing cushion 12 does not have a large coefficient of friction unlike the non-slip sheet 11, the heat transfer sheet 10 folded back on the back surface can slide in the vertical and horizontal directions. The heat transfer sheet 10 is pressed against the circuit board 8 at the portion where the pressing cushion 12 abuts.

-Effect of the embodiment-
(1) According to the present embodiment, the rechargeable battery 7 is pressed against the sheet metal frame 6 by the pressing cushion 12 on the back side of the rechargeable battery 7, and the non-slip sheet 11 attached to the rechargeable battery 7 moves the rechargeable battery 7. Therefore, the rechargeable battery 7 does not move when dropped, and the circuit board 8 is prevented from being damaged. Moreover, since it is not necessary to firmly fix the rechargeable battery 7 with a double-sided tape or the like, it is very easy to remove the rechargeable battery 7. And since the heat of the circuit board 8 is transmitted to the sheet metal frame 6 side by the heat transfer sheet 10, it is prevented that the heat is accumulated and the user feels uncomfortable or causes a malfunction.

  (2) In this embodiment, only a part of the rechargeable battery 7 is attached to the heat transfer sheet 10, and the portion of the heat transfer sheet 10 attached to the rechargeable battery 7 is on the back surface of the sheet metal frame 6. Not pasted. Thus, the movement of the rechargeable battery 7 is further suppressed by sticking a part of the rechargeable battery 7 to the heat transfer sheet 10. On the other hand, the area where the heat transfer sheet 10 and the rechargeable battery 7 are attached is minimized, and the portion of the heat transfer sheet 10 where the rechargeable battery 7 is attached is not fixed to the sheet metal frame 6. Replacement of the battery 7 becomes extremely easy.

  (3) The pressing cushion 12 is cut out at a portion corresponding to the central portion of the rechargeable battery 7. For this reason, the swelling of the rechargeable battery 7 can be permitted. Instead of cutting out the pressure cushion 12, the anti-slip sheet 11 side may be cut out, or both may be cut out to adjust the degree of swelling of the rechargeable battery 7.

  Therefore, according to the mobile phone 1 according to the present embodiment, it is possible to easily dissipate the heat generated by the circuit board 8 and to easily remove the rechargeable battery 7.

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

  That is, in the above embodiment, the mobile terminal is the mobile phone 1, but it is a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistant), a personal computer, a mobile tool, an electronic dictionary, a calculator, a game machine, and the like. Also good.

  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. The technical features described in each embodiment can be combined with each other, and a new technical feature can be formed by combining them.

1 Mobile phone (mobile terminal)
2 display section
3 Front cabinet
3a Display container
4 Rear cabinet
5 Rear cover
6 Sheet metal frame
7 Rechargeable battery
8 Circuit board
10 Heat transfer sheet
11 Non-slip sheet
12 Press cushion

Claims (3)

A display unit;
A front-side cabinet that has a sheet metal frame and houses the display unit on the front side of the sheet metal frame;
A rechargeable battery disposed on the back side of the sheet metal frame;
A circuit board disposed on the back side of the rechargeable battery;
Coupled to the front cabinet, and a rear cabinet that houses the rechargeable battery and circuit board,
A heat transfer sheet is attached to the back of the sheet metal frame,
On the heat transfer sheet side of the rechargeable battery, a non-slip sheet for suppressing the movement of the rechargeable battery is attached,
Between the rechargeable battery and the circuit board, a pressure cushion that is compressible in the thickness direction of the rechargeable battery is disposed,
The portable terminal, wherein the heat transfer sheet is folded back to the back side of the rechargeable battery and is sandwiched between the pressing cushion and the circuit board. The mobile terminal according to claim 1,
The rechargeable battery is characterized in that only a part of the rechargeable battery is affixed to the heat transfer sheet, and a portion of the heat transfer sheet affixed to the rechargeable battery is not affixed to the back surface of the sheet metal frame. Mobile terminal. The mobile terminal according to claim 1 or 2,
A portable terminal, wherein at least one of the pressing cushion and the non-slip sheet is cut out at a portion corresponding to a central portion of the rechargeable battery.

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