JP2012104549A - Heat radiation structure and method of portable terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently radiate heat of a heating member disposed in a housing to the exterior of the housing.SOLUTION: A heat radiation structure 10 of a portable terminal device 100 includes: a connector connection part 4 connecting with an external device; a cover member 5 used for covering the connector connection part 4 and provided so as to open and close; a heat conduction member 6 which connects with the connector connection part 4 at one end, connects with a heating member in a housing 1 at the other end, and is partially cut; and a switching member 7 switching a cut part 61 of the heat conduction member 6 between a connection state and a non-connection state according to opening and closing of the cover member 5.

Description

  The present invention relates to a heat dissipation structure for a mobile terminal device and a heat dissipation method for efficiently radiating heat generated from a heat generating member disposed in the housing of the mobile terminal device to the outside of the housing.

  In recent years, in portable terminal devices such as mobile phones, not only the amount of heat generated by heat generating members such as CPU (Central Processing Unit) composed of LSI (Large Scale Integration) etc. has increased, but also thinning of portable terminal devices. And miniaturization is progressing at the same time. For this reason, the problem that heat generating members, such as CPU, become high temperature locally in the narrow space of the housing of a portable terminal device has arisen (FIG. 4).

  When suppressing local heat generation in the casing of such a portable terminal device, for example, measures such as temporarily reducing the amount of current supply when the temperature exceeds a set temperature by temperature control of the thermistor are taken. ing. However, there is a possibility that the mobile terminal device cannot exhibit sufficient performance by simply reducing the current supply amount.

  Therefore, a heat dissipation structure is known that dissipates heat generated from a heat generating member arranged in the casing of the mobile terminal device to the outside of the housing via an external connection terminal (see, for example, Patent Document 1).

JP 2007-207870 A

  However, in the heat dissipation structure of the portable terminal device, since the heat generating member and the external connection terminal are always connected even when the external connection terminal is not used, the external connection terminal may locally become hot.

  The present invention has been made to solve such problems, and has a heat dissipation structure and a heat dissipation method for a portable terminal device that can efficiently dissipate heat from a heat generating member disposed inside the housing to the outside of the housing. The main purpose is to provide.

  One aspect of the present invention for achieving the above object is a portable terminal device comprising: a connector connecting portion connected to an external device; and a cover member provided to be openable and closable for covering the connector connecting portion. A heat-dissipating structure, one end of which is connected to the connector connecting portion, the other end is connected to a heat-generating member in the housing, and a part thereof is cut; and the cover member And a switching member that switches a cut portion of the heat conducting member between a connected state and a non-connected state in accordance with opening / closing of the heat conduction member.

  Another aspect of the present invention for achieving the above object is a portable terminal comprising: a connector connecting portion connected to an external device; and a cover member provided to be openable and closable for covering the connector connecting portion. A method for radiating heat of the apparatus, according to opening and closing of the cover member, one end is connected to the connector connecting portion and the other end is connected to the cutting portion of the heat conducting member connected to the heat generating member in the housing. It may be a heat dissipation method for a portable terminal device characterized by switching to a non-connected state.

  Furthermore, one aspect of the present invention for achieving the above object is a heat dissipation structure of a mobile terminal device including a connector connecting portion connected to an external device, one end being connected to the connector connecting portion and the other end being A heat conductive member that is connected to a heat generating member in the housing and is partially cut, and a cut portion of the heat conductive member is connected and disconnected depending on the temperature of the heat generating member. And a switching unit that switches to a state.

  ADVANTAGE OF THE INVENTION According to this invention, the heat dissipation structure of the portable terminal device which can thermally radiate the heat | fever of the heat-emitting member arrange | positioned in the housing | casing outside a housing | casing efficiently, and the heat dissipation method can be provided.

It is a perspective view which shows schematic structure of the portable terminal device which concerns on one Embodiment of this invention, and is a figure which shows the cover member of an open state. It is a perspective view which shows schematic structure of the portable terminal device which concerns on one Embodiment of this invention, and is a figure which shows the cover member of a closed state. It is a figure which shows an example of a high temperature distribution when the heat which generate | occur | produced in the board | substrate unit is radiated | emitted from the connector connection part via a heat conductive member. It is a figure which shows an example of the high temperature distribution in the conventional portable terminal device.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a mobile terminal device according to an embodiment of the present invention. The mobile terminal device 100 according to this embodiment includes, for example, a mobile phone (including PHS (Personal Handyphone System)), a PDA (Personal Data Assistance or Personal Digital Assistants), a music player, and the like. A small portable terminal includes a substrate unit 2 including a CPU (Central Processing Unit) and electronic components, and a rechargeable battery 3 such as a lithium ion battery. The CPU is composed of an integrated circuit such as an LSI (Large Scale Integration) or an IC (Integrated Circuit).

  The board unit 2 generates heat when, for example, power is supplied from the battery 3 to drive the board unit 2 or during charging of the rechargeable battery 3. Further, since the board unit 2 is arranged in a narrow space in the housing 1 as the portable terminal device 100 is reduced in size and thickness, it is a heat generating member that becomes high temperature due to the heat generation. Therefore, it is necessary to efficiently dissipate the heat of the substrate unit 2 arranged in the housing 1 to the outside of the housing 1.

  Therefore, the mobile terminal device 100 according to the present embodiment includes the heat dissipation structure 10 that efficiently dissipates the heat of the substrate unit 2 disposed in the housing 1 to the outside of the housing 1. The heat dissipation structure 10 switches the connector connection part 4 for charging, the cover member 5 for covering the connector connection part 4, the heat conductive heat conduction member 6, and the heat conduction member 6 between a connected state and a non-connected state. And a switching member 7.

  The connector connecting portion 4 is a connecting portion for charging that is connected to the rechargeable battery 3 through wiring or the like. For example, a connector (not shown) such as an AC adapter is connected to the connector connecting portion 4, and power is supplied to the rechargeable battery 3 via the AC adapter and connector connecting portion 4, whereby the rechargeable battery 3 is charged. Is done. Note that the mobile terminal device 100 is configured to be able to be charged using, for example, a desktop holder.

  The cover member 5 is made of resin or the like, and is provided on the housing 1 so as to be opened and closed. When the cover member 5 is in the open state, the connector connecting portion 4 is exposed to the outside, and when the cover member 5 is in the closed state, the connector connecting portion 4 is covered with the cover member 5. The cover member 5 is in an open state when the AC adapter is connected to the connector connecting portion 4 and the rechargeable battery 3 is charged (FIG. 1). On the other hand, the cover member 5 is in a closed state when the AC adapter is not connected to the connector connecting portion 4 and the rechargeable battery 3 is not charged (FIG. 2).

  The heat conductive member 6 is made of, for example, a metal, resin, or the like having high heat conductivity, and the heat conductivity is preferably higher than the heat conductivity of the unit substrate 2. One end of the heat conducting member 6 is connected to the connector connecting portion 4, and the other end is connected to the substrate unit 2 in the housing 1. Further, a part of the heat conducting member 6 is cut, and a cut portion 61 separated by a predetermined interval is formed.

  According to the opening and closing of the cover member 5, the switching member 7 is in contact with the cutting portion 61 of the heat conducting member 6 and connected to the cutting portion 61 (FIG. 1), and away from the cutting portion 61 of the heat conducting member 6. Switching to the unconnected state (FIG. 2). In addition, although the cover member 5 and the switching member 7 are comprised separately, you may be comprised integrally.

  For example, when the cover member 5 is in the open state and the end of the switching member 7 is physically connected to the cutting portion 61 of the heat conducting member 6 and connected to the cutting portion 61, the heat conducting member 6 is It will be in the heat conduction state which conducts heat from the 2 side to the connector connection part 4 side (FIG. 1). On the other hand, when the cover member 5 is in a closed state and the switching member 7 is in a disconnected state away from the cutting portion 61 of the heat conducting member 6, the heat conducting member 6 conducts heat from the board unit 2 side to the connector connecting portion 4 side. It becomes a non-thermal conduction state (FIG. 2).

  Although the heat dissipation structure 10 of the mobile terminal device 100 has been described in detail in the above description, the mobile terminal device 100 has a general display function, a communication function, and the like. The detailed explanation is omitted.

  Next, the effect | action by the thermal radiation structure 10 of the portable terminal device 100 which concerns on this embodiment is demonstrated in detail.

  When the cover member 5 changes from the closed state to the open state, and the connector connecting portion 4 is used for charging the rechargeable battery 3, the switching member 7 brings the cutting portion 61 of the heat conducting member 6 into the connected state, and the heat conducting member 6 is turned on. Set to heat conduction state. Thereby, the heat generated in the board unit 2 in the housing 1 is transmitted to the connector connecting portion 4 via the heat conducting member 6 and efficiently radiated from the connector connecting portion 4 to the outside of the housing 1. FIG. 3 is a diagram showing a high-temperature distribution when heat generated in the board unit 2 is radiated from the connector connecting portion 4 via the heat conducting member 6.

  At this time, when the AC adapter is connected to the connector connecting portion 4, the heat from the board unit 2 is transmitted to the AC adapter via the connector connecting portion 4, and the efficiency is obtained from both the connector connecting portion 4 and the AC adapter. Heat is released. As described above, when the user opens the cover member 5, connects the AC adapter to the connector connection portion 4 and charges the rechargeable battery 3, the heat generated in the unit substrate 2 in the housing 1 is efficiently transferred to the outside of the housing 1. Heat can be radiated and the temperature of the housing 1 can be lowered.

  On the other hand, when the cover member 5 changes from the open state to the closed state, and the connector connecting portion 4 is not used, the switching member 7 disconnects the cutting portion 61 of the heat conducting member 6 and puts the heat conducting member 6 in the non-heat conducting state. To. Thereby, since the heat generated in the board unit 2 in the housing 1 is not transmitted to the connector connecting portion 4 via the heat conducting member 6, the connector connecting portion 4 covered with the cover member 5 is locally heated. Can be prevented.

  As described above, in the heat dissipation structure 10 of the mobile terminal device 100 according to the present embodiment, the switching member 7 switches the cut portion 61 of the heat conducting member 6 to the connected state when the cover member 5 is in the open state. Thereby, the heat generated in the board unit 2 in the housing 1 can be efficiently radiated from the connector connecting portion 4 to the outside of the housing 1 via the heat conducting member 6. On the other hand, the switching member 7 switches the cutting part 61 of the heat conducting member 6 to the disconnected state when the cover member 5 is in the closed state. Thereby, it can prevent that the connector connection part 4 covered with the cover member 5 becomes high temperature locally. That is, the heat generated in the substrate unit 2 in the housing 1 can be efficiently radiated to the outside of the housing 1.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  For example, in the above embodiment, the connector connecting portion 4 is a connecting portion for charging, but is not limited thereto, and may be a connecting portion to which an earphone, a headphone, or the like is connected. Thus, an arbitrary connecting portion to which the substrate unit 2 is connected and provided with an openable / closable cover member 5 can be used.

  Moreover, in the said embodiment, although the switching member 7 switches the cutting part 61 of the heat-conduction member 6 to a connection state and a non-connection state according to opening and closing of the cover member 5, it is not restricted to this, For example, The connection state and the non-connection state may be switched by software using a temperature switch IC or the like. Specifically, the temperature switch IC (switching unit) may bring the cutting part 61 of the heat conducting member 6 into a connected state when the temperature of the substrate unit 2 becomes equal to or higher than a predetermined temperature.

  Furthermore, part or all of the above-described embodiments can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A heat dissipation structure for a portable terminal device, comprising: a connector connecting portion connected to an external device; and a cover member provided so as to be openable and closable to cover the connector connecting portion, one end connected to the connector connecting portion The other end is connected to the heat generating member in the housing, and a part of the heat generating member is cut, and the cutting portion of the heat conducting member is changed according to the opening and closing of the cover member. And a switching member that switches between a connected state and a non-connected state.
(Appendix 2)
(Supplementary Note 1) In the heat dissipation structure of the mobile terminal device, when the cover member is in an open state, the switching member is connected to a cut portion of the heat conducting member, and when the cover member is in a closed state, The switching member is a heat dissipation structure for a portable terminal device, wherein the cut portion of the heat conducting member is disconnected.
(Appendix 3)
(Supplementary Note 1) or (Supplementary Note 2), a heat dissipation structure for a portable terminal device, wherein the connector connection portion is a connection portion for charging connected to a rechargeable battery. Construction.
(Appendix 4)
(Attachment 1) to (Attachment 3), the heat dissipation structure of the portable terminal device, wherein the thermal conductivity of the heat conducting member is set higher than the thermal conductivity of the heat generating member. A heat dissipation structure for a portable terminal device.
(Appendix 5)
A heat dissipation structure for a mobile terminal device according to any one of (Appendix 1) to (Appendix 4), wherein the heat generating member is a substrate unit including a CPU.
(Appendix 6)
The mobile terminal device according to any one of (Appendix 1) to (Appendix 5), wherein the mobile terminal device is a mobile phone, a PDA, or a music player. Heat dissipation structure.
(Appendix 7)
A heat dissipation method for a portable terminal device comprising: a connector connecting portion connected to an external device; and a cover member provided to be openable and closable for covering the connector connecting portion, according to opening and closing of the cover member The heat dissipation of the portable terminal device is characterized in that one end is connected to the connector connecting portion and the other end is switched between a connected state and a disconnected state of the heat conducting member connected to the heat generating member in the housing. Method.
(Appendix 8)
(Supplementary Note 7) In the heat dissipation method for a portable terminal device, when the cover member is in an open state, the cut portion of the heat conductive member is in a connected state, and when the cover member is in a closed state, A heat dissipation method for a portable terminal device, characterized in that the cut portion is in a disconnected state.
(Appendix 9)
A heat dissipation structure of a mobile terminal device including a connector connection portion connected to an external device,
One end is connected to the connector connecting portion, the other end is connected to the heat generating member in the housing, and a part thereof is cut, a heat conductive heat conductive member,
A heat dissipation structure for a portable terminal device, comprising: switching means for switching a cut portion of the heat conducting member between a connected state and a disconnected state in accordance with the temperature of the heat generating member.

DESCRIPTION OF SYMBOLS 1 Housing 2 Board | substrate unit 3 Rechargeable battery 4 Connector connection part 5 Cover member 6 Thermal conduction member 7 Switching member 10 Heat dissipation structure 61 Cutting part 100 Portable terminal device

Claims (9)

A connector connection part connected to an external device;
A cover member provided to be openable and closable for covering the connector connecting portion, and a heat dissipation structure for a portable terminal device,
One end is connected to the connector connecting portion, the other end is connected to the heat generating member in the housing, and a part thereof is cut, a heat conductive heat conductive member,
A heat dissipation structure for a portable terminal device, comprising: a switching member that switches a cut portion of the heat conducting member between a connected state and a disconnected state in accordance with opening and closing of the cover member. A heat dissipation structure for a portable terminal device according to claim 1,
When the cover member is in the open state, the switching member is connected to the cut portion of the heat conducting member,
When the cover member is in a closed state, the switching member makes a cut portion of the heat conducting member in a disconnected state. A heat dissipation structure for a portable terminal device according to claim 1 or 2,
The connector connecting portion is a charging connecting portion connected to a rechargeable battery, wherein the heat dissipation structure of the portable terminal device. A heat dissipation structure for a portable terminal device according to any one of claims 1 to 3,
A heat dissipation structure for a portable terminal device, wherein the heat conductivity of the heat conducting member is set higher than the heat conductivity of the heat generating member. A heat dissipation structure for a portable terminal device according to any one of claims 1 to 4,
A heat dissipation structure for a portable terminal device, wherein the heat generating member is a substrate unit including a CPU. A heat dissipation structure for a portable terminal device according to any one of claims 1 to 5,
The mobile terminal device is a mobile phone, a PDA, or a music player, wherein the mobile terminal device has a heat dissipation structure. A connector connection part connected to an external device;
A cover member provided to be openable and closable for covering the connector connecting portion, and a heat dissipation method for a portable terminal device,
According to opening and closing of the cover member, one end is connected to the connector connecting portion, and the other end is switched to a connected state and a disconnected state of the cutting portion of the heat conducting member connected to the heating member in the housing. A heat dissipating method for a portable terminal device. It is the thermal radiation method of the portable terminal device of Claim 7, Comprising:
When the cover member is in the open state, the cut portion of the heat conducting member is connected,
When the cover member is in the closed state, the cutting portion of the heat conducting member is disconnected. A heat dissipation structure of a mobile terminal device including a connector connection portion connected to an external device,
One end is connected to the connector connecting portion, the other end is connected to the heat generating member in the housing, and a part thereof is cut, a heat conductive heat conductive member,
A heat dissipation structure for a portable terminal device, comprising: switching means for switching a cut portion of the heat conducting member between a connected state and a disconnected state in accordance with the temperature of the heat generating member.

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