JP2007265800A - Charging cradle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charging cradle 3 for a portable phone 1 which can obtain a sufficient heat radiation effect without design change of the portable phone 1, and does not need forced air cooling with an air-cooling fan. <P>SOLUTION: A casing 31 of this charging cradle 3 includes a support 32; a heat-absorbing face 30 which is formed on the support 32, made of a material having a higher heat conduction than that of a material used for the casing 31, and also capable of closely contacting with a portable phone 1; and air holes 34 for sucking and discharging air. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a charging stand for charging a portable electronic device such as a mobile phone.

In recent years, mobile phones have become more and more multifunctional, and for example, those having a reception function for television broadcasting have been developed.
In a mobile phone having a television broadcast receiving function, the power consumption during the reception of the television broadcast increases, so the mobile phone (1) is installed on the charging stand (4) as shown in FIG. While charging the battery built in the body (11), the television broadcast is displayed on the display provided in the display-side casing (12).

The charging stand (4) is formed with a support portion (42) to support the mobile phone (1) in a synthetic resin casing (41), and a charging device is provided in the internal space (20) of the casing (41). (Not shown) is accommodated.
In the charging stand (4), the mobile phone (1) is supported by the support portion (42) of the casing (41), the surface (40) of the support portion (42) and the operation side case (11). In order to dissipate the heat generated by the mobile phone (1) during charging, a gap as large as possible is provided between the back of the mobile phone and the back of the mobile phone.

  However, in the mobile phone (1) having a television broadcast receiving function, the power consumption during broadcasting reception is large as described above, and charging with a large current is performed for a long time. In addition to the heat generated from the circuit board, the battery built in the operation-side housing (11) generates a large amount of heat, and it is sufficient to radiate heat from the slight gap between the mobile phone (1) and the charging stand (4). Heat dissipation effect cannot be obtained. As a result, there is a problem that the mobile phone (1) becomes high temperature.

Therefore, while opening the intake hole at the top of the casing of the equipment to be charged and the exhaust hole at the bottom, the casing of the charging stand has an intake hole at the equipment support, an exhaust hole at the bottom, and a built-in air cooling fan. Thus, there has been proposed a structure for forcibly cooling the inside of the device by forming an air flow path from the intake hole of the device to the exhaust hole and from the intake hole of the charging stand to the exhaust hole (Patent Document 1).
JP 2000-269672 A [H05K7 / 20]

  However, in the above-described cooling structure, not only is it necessary to change the design for opening the intake and exhaust holes in the casing of the device to be charged, but also the space for installing the air cooling fan in the casing of the charging stand is indispensable. Thus, there is a problem that leads to an increase in the size of the charging stand.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a charging stand that can obtain a sufficient heat dissipation effect without changing the design of a device to be charged and that does not require forced cooling by an air cooling fan or the like.

  A charging stand according to the present invention has a support portion for a portable electronic device in a casing and charges the portable electronic device on the support portion, and the surface of the support portion of the casing is portable. A heat absorbing surface made of a material that can be in close contact with an electronic device and has a higher thermal conductivity than the material forming the casing is provided, and the casing has openings for intake and exhaust.

In the charging stand of the present invention, the device generates heat in the process of installing and charging the portable electronic device on the support portion of the casing, and the back surface of the device is in close contact with the heat absorbing surface of the casing. The heat generated from the heat is transferred to the heat-absorbing surface with high thermal conductivity and absorbed, and further dissipated into the casing. As a result, the air in the casing is heated, but the heat is released to the outside by intake and exhaust through the opening.
As a result, a sufficient heat dissipation effect can be obtained, and the portable electronic device does not become hot due to heat generation.

In a specific configuration, the entire support portion is made of a material having higher thermal conductivity than the material forming the casing, and a heat radiating fin protruding toward the inside of the casing is integrally formed on the back surface of the support portion. Molded.
According to this specific configuration, heat generated from the portable electronic device is transmitted to the support portion of the casing with high thermal conductivity, and is further efficiently dissipated into the casing by the heat radiating fins.

In a specific configuration, the surface of the support portion is coated with a heat conductive resin, and the heat absorbing surface is formed by the heat conductive resin.
According to this specific configuration, the adhesion between the surface of the support portion and the back surface of the portable electronic device is improved.

In a more specific configuration, the support portion has a substantially horizontal surface, and the casing is provided with vent holes in the front and rear, left and right, or both sides of the support portion, so that the opening is formed. Forming.
In this specific configuration, intake and exhaust are performed through the vent hole, whereby heat in the casing is released to the outside.

In another specific configuration, the support portion is formed with an inclined surface, and the casing has an intake hole on the lower side and an exhaust hole on the upper side across the support portion, and the opening is formed. Forming.
In the specific configuration, air is sucked into the casing from the intake hole, the air is discharged from the exhaust hole to the outside of the casing, and the heat in the casing is released to the outside.

  According to the charging stand according to the present invention, a sufficient heat radiation effect can be obtained without changing the design of the portable electronic device to be charged, and forced cooling with an air cooling fan or the like is not necessarily required.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in which the present invention is applied to a foldable mobile phone charging base will be specifically described below with reference to the drawings.
As shown in FIG. 3, the mobile phone (1) to be charged includes an operation side case (11) provided with operation keys (13) and a display side case (12 provided with a display (14)). ) And can be opened and closed in both cases (11) and (12), and has a telephone communication function and a television broadcast receiving function.

  As shown in FIG. 1, the mobile phone (1) is installed on the charging stand (3) with the display-side housing (12) opened and the operation-side housing (11) in a horizontal posture. While charging the battery in the body (11), the television broadcast can be viewed on the display of the display-side casing (12).

On the other hand, the charging stand (3) includes a flat synthetic resin casing (31) with a built-in charging device (not shown), closes the upper surface opening of the casing (31), and absorbs heat formed of an aluminum molded product. The support part (32) is attached horizontally.
The surface of the heat absorption support part (32) is formed into a concavo-convex surface corresponding to the concavo-convex shape of the back surface of the operation side casing (11) of the mobile phone (1), and the surface is coated with a heat conductive resin, An endothermic surface (30) that can be in close contact with the back surface of the operation side casing (11) of the cellular phone (1) is formed. A plurality of heat radiation fins (33) protruding toward the internal space (2) of the casing (31) are integrally formed on the back surface of the heat absorption support portion (32).
The casing (31) of the charging stand (3) is provided with a plurality of vent holes (34) and (34) on the front and rear front and rear surfaces, respectively, with the heat absorption support portion (32) interposed therebetween.

In the charging stand (3), when watching a television broadcast while charging the mobile phone (1), as shown in FIG. 1, the mobile phone (1) is installed on the endothermic support (32). The back surface of the operation side housing (11) is in close contact with the heat absorbing surface (30) of the heat absorbing support (32), and the heat generated from the mobile phone (1) is absorbed from the heat absorbing surface (30) with high thermal conductivity. It is transmitted to the support part (32) and is absorbed by the heat absorption support part (32).
And the heat of the heat absorption support part (32) is efficiently dissipated to the internal space (2) of the casing (31) by the radiation fins (33) as shown by arrows in the figure.

As a result, the air in the casing (31) is heated, but air is sucked and exhausted through the vent holes (34) and (34) of the casing (31), thereby releasing the heat in the casing (31) to the outside. The
Therefore, a sufficient heat dissipation effect is obtained, and the mobile phone (1) does not become hot due to heat generation.

The charging stand (3) shown in FIG. 4 supports the operation side casing (11) in an upright position by opening the cellular phone (1). The casing (35) includes an operation side casing ( The endothermic support portion (36) made of aluminum that can be in close contact with the back surface of (11) is installed at an inclined angle, and a plurality of radiating fins (37) project from the back surface of the endothermic support portion (36). .
The casing (35) has an intake hole (38) at a position below the heat absorption support (36) and an exhaust hole (39) at a position above the heat absorption support (36). .

In the charging stand (3), when the user listens to the television broadcast while charging the mobile phone (1), the mobile phone (1) is installed on the heat absorption support (36) as shown in FIG. The back surface of the operation side case (11) is in close contact with the heat absorption support part (36), and the heat generated from the mobile phone (1) is transferred to the heat absorption support part (36) with high thermal conductivity, and the heat absorption support part ( The heat is absorbed by 36).
And the heat of the heat absorption support part (36) is efficiently dissipated into the casing (35) by the radiation fins (37).

As a result, the air in the casing (35) is heated, but as indicated by the arrows in FIG. 4, low-temperature air is sucked into the casing (35) from the intake hole (38), and becomes high due to the heating. The discharged air is discharged from the exhaust hole (39) to the outside of the casing (35), and the heat in the casing (35) is released to the outside.
Therefore, a sufficient heat dissipation effect is obtained, and the mobile phone (1) does not become hot due to heat generation.

FIG. 5 is a graph for explaining the effect of the charging stand according to the present invention, and shows the temperature change of the mobile phone after the start of charging.
In the conventional normal charging stand, the temperature rises with time and saturates at a temperature much higher than room temperature.

  On the other hand, in a charging stand that has only an endothermic mechanism in which the endothermic surface of the endothermic support part is in close contact with the back surface of the mobile phone and does not have an exhaust heat mechanism with heat radiating fins and vent holes, the temperature rises due to the cooling effect due to endothermic However, the saturation temperature after a long time is not much different from the saturation temperature in a normal charging stand.

  On the other hand, in the charging stand of the present invention provided with both the endothermic mechanism and the exhaust heat mechanism, the temperature rise curve becomes more gradual, and the saturation temperature after a certain period of time is higher than the saturation temperature in the normal charging stand. It will drop significantly.

Each part structure of the charging stand (3) based on this invention is not restricted to the said Example, A various deformation | transformation is possible within the technical scope as described in a claim. The endothermic support portion (32) is not limited to a metal, and can be formed of a material having higher thermal conductivity than that of a synthetic resin, for example, thermally conductive silicon, carbon graphite, or the like.
Further, it is possible to adopt a configuration in which the heat radiating fins (33) of the heat absorption support portion (32) are provided so as to protrude toward the outside of the casing (31).

  According to the charging stand (3) of the present invention, a sufficient heat dissipation effect can be obtained by natural cooling as in the above embodiment. For example, instead of the heat dissipating fins (33) of the heat absorbing support portion (32), the Peltier It is also possible to install an element and forcibly cool the heat absorption support part (32), and thereby a higher heat dissipation effect can be obtained.

It is sectional drawing which shows the state which installed the mobile telephone in the charging stand which concerns on this invention. It is sectional drawing which shows the state which installed the mobile telephone in the conventional charging stand. It is a perspective view which shows the charging stand and portable telephone which concern on this invention. It is sectional drawing which shows the state which installed the mobile telephone in the charging stand of this invention which has another structure. It is a graph which shows the temperature rise at the time of charge of a mobile telephone.

Explanation of symbols

(1) Mobile phone
(11) Operation side case
(12) Display side housing
(3) Charging stand
(30) Endothermic surface
(31) Casing
(32) Endothermic support
(33) Radiation fin
(34) Vent

Claims (6)

  In a charging stand that has a support portion for a portable electronic device in a casing and charges the portable electronic device on the support portion, the surface of the support portion of the casing can be in close contact with the portable electronic device, and A heat absorbing surface made of a material having higher thermal conductivity than the material forming the casing is provided, and the casing is provided with a heat exhaust mechanism for discharging the heat in the casing to the outside. Charging stand.   The charging stand according to claim 1, wherein the exhaust heat mechanism is configured by openings for intake and exhaust established in a casing.   The surface of the support portion is formed substantially horizontally, and the casing is formed with a vent hole in front and rear, left and right or both sides of the support portion to form the opening. The charging stand as described in.   3. The support portion according to claim 2, wherein the support portion is formed with an inclined surface, and the casing is provided with an intake hole on the lower side and an exhaust hole on the upper side with the support portion interposed therebetween to form the opening. The charging stand described.   The support part as a whole is formed of a material having higher thermal conductivity than the material forming the casing, and a heat radiating fin protruding into the casing is integrally formed on the back surface of the support part. The charging stand according to any one of claims 1 to 4.   The charging stand according to any one of claims 1 to 5, wherein a surface of the support portion is coated with a heat conductive resin, and the heat absorbing surface is formed by the heat conductive resin.

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