WO2015050048A1

WO2015050048A1 - Mobile electronic device case

Info

Publication number: WO2015050048A1
Application number: PCT/JP2014/075592
Authority: WO
Inventors: 博史青木; 義勝稲垣; 壮史平澤; 池田　匡視
Original assignee: 古河電気工業株式会社
Priority date: 2013-10-01
Filing date: 2014-09-26
Publication date: 2015-04-09
Also published as: JP2016201580A; CN205681514U; TW201531197A

Abstract

Provided is a mobile electronic device case which is made thin and light and which does not readily transfer heat to a cover back-face. The mobile electronic device case is characterized by the following: comprising a thin heat transfer member (5) that is disposed in the gap between a housing (20) of an electronic device (1) and a case part (3) provided at the back face of the housing (20); and in that the heat transfer member has a heat receiving part (5A) disposed at a surface corresponding to a heat generation source (7) and a heat dissipation part (5B) disposed at a non-gripping part.

Description

Mobile electronics case

The present invention relates to a case of a mobile electronic device such as a smartphone or a mobile phone.

In general, a portable terminal cover is known in which an air layer is provided between a portable terminal and a cover with a vent so that heat is hardly transmitted to the back of the cover (Patent Document 1). In this type of portable terminal cover, the flexible cover is crushed by hand, expelling the air in the air layer and releasing the hand to circulate the air, thereby providing a cooling effect.
Further, a waterproof case has been proposed in which a heat receiving portion is disposed so as to face a waste heat portion of an electronic device, and a high heat conductive member including a heat sink in which a heat radiating portion is disposed outside is provided in a watertight state (Patent Document). 2).
Further, a notebook computer storage case using a heat conductive member at least at a position in contact with the bottom surface of the notebook computer has been proposed (Patent Document 3).

JP 2013-150067 A JP 2007-207984 A Japanese Patent Laid-Open No. 10-262719

However, mobile electronic devices such as smartphones are required to be thin and light, and as in Patent Document 1, providing an air layer brings about a significant increase in thickness and a flexible cover. Then, there is a problem that the grip feeling is lowered, and it is easy to drop when the electronic device is held.
Patent Document 2 and Patent Document 3 also require a space for disposing a heat conducting member, which causes a problem of being thin and light in mobile electronic devices such as smartphones.

Some mobile electronic devices include a short-range wireless communication antenna (NFC antenna: Neer Field Communication) in a battery case.
However, there is a problem that the area where the antenna is formed is limited to the size of the battery and the reception sensitivity is low, and if either the battery or the antenna malfunctions, both must be replaced at the same time, leading to an increase in cost. There's a problem.
SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile electronic device case that solves the problems of the prior art described above, achieves thinness and weight reduction, and makes it difficult to transfer heat to the back of the cover.

In order to achieve the above object, the present invention is arranged in a gap between a casing of an electronic device and a case portion provided on the back surface of the casing, and a heat receiving portion is arranged on a surface corresponding to a heat generation source, so that a non-gripping portion is provided. It has a thin heat conduction member in which a heat radiating part is arranged.
According to the present invention, the thin heat conducting member is disposed in the gap between the casing and the case portion, so that the thin and light weight can be achieved, and the heat conducting member functions, so that heat is transmitted to the back of the cover. It becomes difficult. Therefore, the mobile electronic device can be used for a long time without causing the user to feel uncomfortable. Moreover, since it is not necessary to give flexibility to a case part, a grip feeling increases and holding property improves.

In this case, the heat conducting member may be attached to either the casing or the case portion.
The case portion may be a back cover of the housing.
The case portion may be an external protective case.
In these configurations, simply attaching the case part to the back of the case makes it easy to hold the thin heat conduction member between the case and the case part, eliminating the need for an extra air layer, making it thinner and lighter Can be achieved. Since the housing and the case portion are in close contact with each other via the heat conducting member, heat is diffused and it is difficult to transfer heat to the grip portion on the back surface of the case portion.

The heat dissipating part may be disposed on a surface corresponding to the battery.
In this configuration, the inflow of heat from the heat generation source to the battery can prevent the cell voltage from decreasing in a cold region, extend the battery life, and improve the reception sensitivity of the NFC (Near field communication) antenna built in the battery.
The heat dissipating part may be arranged avoiding a surface corresponding to a battery.
With this configuration, heat can be prevented from flowing from the heat source to the battery, which is suitable for use in a tropical climate. Thereby, the temperature rise of a holding part can be prevented and the heat_generation | fever of a battery can be suppressed.

The heat conducting member may function as a reception assisting member for an NFC antenna built in the electronic device.
According to this configuration, since the heat conducting member functions as a reception auxiliary member for the NFC antenna, the reception sensitivity of the NFC antenna can be improved by the heat conducting member.
Further, the heat conducting member may function as an NFC antenna.
When the heat conducting member functions as an NFC antenna, an antenna with high reception sensitivity can be obtained.

The heat conducting member may be a heat pipe.
The heat conducting member may be a graphite sheet.
The heat conducting member may be graphene.
The heat conducting member may be a metal plate.
The heat conducting member may be a combination of a plurality of heat conducting parts.
In any configuration, the heat conducting member can be made extremely thin, and mobile electronic devices such as smartphones can be made thin and light.
Further, the heat conducting members listed here are not limited to their use, but are examples for realizing the effects of the present invention, and other heat conducting members may be used.

This specification includes all contents of Japanese Patent Application No. 2013-206352 filed on Oct. 1, 2013.

In the present invention, since no air layer is provided unlike the conventional example, heat can be diffused to the non-gripping portion without increasing the thickness of the mobile electronic device so that the user does not feel uncomfortable. Moreover, since it is not necessary to give flexibility to a case part, a grip feeling increases and holding property improves.
In addition, if the heat conducting member functions as an NFC antenna reception assisting member or an NFC antenna, the heat conducting member can improve the reception sensitivity of the NFC antenna.

FIG. 1 is a diagram showing an embodiment of the present invention, in which A shows an example of using a smartphone in a vertical orientation, and B shows an example of usage in a landscape orientation. FIG. 2 is an exploded perspective view of the smartphone and the protective cover. FIG. 3A is a side sectional view of a state in which a protective cover is assembled to a smartphone, and FIG. 3B is a rear view thereof. 4A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 4B is a rear view thereof. FIG. 5A is an exploded perspective view of a smartphone and a protective cover according to another embodiment, and FIG. 5B is a side sectional view thereof. FIG. 6A is an exploded perspective view of a smartphone and a protective cover according to another embodiment, and FIG. 6B is a side sectional view thereof. FIG. 7A is a rear view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 7B is a side sectional view thereof. FIG. 8A is a rear view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 8B is a side sectional view thereof. FIG. 9A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 9B is a rear view thereof. FIG. 10A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 10B is a rear view thereof. FIG. 11A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 11B is a rear view thereof. FIG. 12A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 12B is a rear view thereof. FIG. 13A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 13B is a rear view thereof. FIG. 14A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 14B is a rear view thereof. FIG. 15A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 15B is a rear view thereof. FIG. 16A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 16B is a rear view thereof. FIG. 17A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 17B is a rear view thereof. 18A is a side sectional view of a state in which a protective cover is assembled to a smartphone according to another embodiment, and FIG. 18B is a rear view thereof.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of the present invention.
Reference numeral 1 denotes a smartphone as a mobile electronic device. The smartphone 1 has a plate-shaped housing 20, and in normal use, as shown in FIG. 1A, the housing 20 is used vertically, and in use of a camera, a game, etc., as shown in FIG. 1B, The housing 20 is held sideways. When used vertically, as shown in FIG. 1A, generally, the lower half is the area A of the gripping portion and the upper half is the area B of the non-gripping portion. In contrast, as shown in FIG. 1B, the left and right lower corners are generally the gripping region C, and the other portions are the non-griping region D, as shown in FIG. 1B. The non-gripping portions B and D are separated from the gripping portion, and correspond to portions where the user's hand is rarely touched during normal use.

FIG. 2 is an exploded perspective view showing an embodiment of the present invention.
The smartphone 1 includes a display screen 1 A on the surface of the housing 20. The smartphone 1 is used by assembling, for example, a protective case (case portion) 3 as an optional resin product externally attached to the back surface portion. An L-shaped heat pipe (heat conducting member) 5 is attached to the inner surface 3A of the protective case 3 facing the back surface of the housing 20 with an adhesive or an adhesive tape. The heat pipe 5 has a flat shape as a whole and is extremely thin with a thickness of 0.3 to 1 mm. The heat pipe 5 has a slight gap δ (FIG. 3) formed between the back surface of the housing 20 and the inner surface of the protective case 3, that is, a gap having a dimension equivalent to the thickness of the heat pipe 5 (0.3 to 1 mm).
The heat pipe 5 includes a heat receiving portion 5A and a heat radiating portion 5B. As shown in FIGS. 3A and 3B, the heat receiving portion 5 A of the heat pipe 5 is disposed so as to be in contact with and overlap with the central portion of the surface corresponding to the heat source 7. The heat source 7 is an electronic component such as a CPU mounted on the smartphone 1. The heat radiating part 5B of the heat pipe 5 extends partially in contact with the side edge of the surface corresponding to the battery 9, and terminates in the regions B and D of the non-gripping part described above.

In the present embodiment, since the ultra-thin heat pipe 5 is tightly held in the gap δ between the back surface portion of the housing 20 and the inner surface of the protective case 3, it is not gripped from the heat source 7 via the heat pipe 5. The heat diffuses toward the regions B and D of the part, and heat conduction to the grip part on the back surface of the protective case 3 is suppressed. Therefore, the electronic device can be made thin and light, the high temperature abnormality of the heat source can be prevented, and the non-gripping portion is a heat radiating portion, so that heat is hardly transmitted to the hand, and the user can be prevented from feeling uncomfortable. Further, unlike the prior art, there is no need to form an air layer for circulating air between the housing 20 and the protective case 3. The electronic equipment can be made thinner and thinner accordingly. The protective case 3 does not need to have flexibility, the grip feeling is increased, and the holding property is improved.
Although the heat pipe 5 has been described with an L shape, the present invention is not limited to this, and various forms such as an I shape, an H shape, a J shape, a U shape, and a V shape are possible.

In the present embodiment, the heat radiating portion 5B of the heat pipe 5 extends while being partially in contact with the side edge of the surface corresponding to the battery 9, so that heat flows from the heat source 7 to the battery 9. This form is suitable for use in a cold region of the smartphone 1. According to this configuration, it is possible to prevent the cell voltage from being lowered in a cold region due to heat flowing into the battery 9 and to extend the life of the battery 9. If the battery has an NFC antenna inside, the heat pipe 5 can improve the reception sensitivity of the NFC antenna.

4A and 4B show another embodiment. In FIG. 4, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
In the present embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. The heat source 7 is an electronic component such as a CPU mounted on the smartphone 1. The heat radiating part 5B of the heat pipe 5 extends away from the side edge of the surface corresponding to the battery 9, that is, avoids the battery 9, and terminates in the regions B and D of the non-gripping part described above.

In the present embodiment, the heat radiating portion 5B of the heat pipe 5 extends so as to avoid the surface corresponding to the battery 9, so that heat does not easily flow from the heat source 7 to the battery 9.
This form is suitable for use in the warm and tropical climate of the smartphone 1. According to this configuration, heat does not easily flow into the battery 9, and heat diffusion to the non-gripping portion is possible. Therefore, in use in a warm or tropical climate, the abnormal temperature rise of the battery 9 can be suppressed, and the life of the battery 9 can be extended.
FIG. 3 shows a protective case 3 for use in a cold region, and FIG. 4 shows a protective case 3 for use in a warm and tropical climate. Therefore, it is possible to easily change to cold region specifications or tropical region use by simply replacing the protective case 3.

5A and 5B show another embodiment. In FIG. 5, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
In the present embodiment, a graphite sheet 10 as a heat conducting member is attached to the inner surface of the protective case 3 with an adhesive or an adhesive tape. The graphite sheet 10 is, for example, graphite which is an allotrope of carbon, that is, graphite processed into a sheet shape. It is characterized by high thermal conductivity, and after diamond, it surpasses gold, silver and copper. The graphite sheet 10 is extremely thin with a thickness of 0.01 to 1 mm. In the gap δ between the back surface portion of the smartphone 1 and the inner surface of the protective case 3, an extremely thin graphite sheet 10 is tightly held.

In this configuration, heat is diffused from the heat source 7 toward the non-grip regions B and D via the graphite sheet 10, and heat conduction to the grip portion on the back surface of the protective case 3 is suppressed. Therefore, the high temperature abnormality of the heat source can be prevented, and the non-gripping portion is a heat radiating portion, so that even if the electronic device is used for a long time, it is difficult for heat to be transmitted to the hand and the user can be prevented from feeling uncomfortable. The graphite sheet 10 is extremely thin and can be reduced in thickness and weight.
Although not limited to the graphite sheet 10, illustration is omitted, but for example, graphene, a metal plate, or the like may be used.
Graphene is, for example, a sheet of SP ² -bonded carbon atoms having a thickness of 1 atom, and has a honeycomb-shaped hexagonal lattice structure made of carbon atoms and bonds thereof.

6A and 6B show another embodiment. In FIG. 6, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
In the present embodiment, a combination body 12 of a heat pipe (heat conduction portion) 5 and a graphite sheet (heat conduction portion) 10 as a heat conducting member is attached to the inner surface of the protective case 3 with an adhesive or an adhesive tape. The graphite sheet 10 is joined to the heat radiating part 5B of the heat pipe 5 so as to be capable of conducting heat. The heat pipe 5 includes a heat receiving portion 5A and a heat radiating portion 5B, and the heat receiving portion 5A of the heat pipe 5 is in contact with a surface corresponding to the heat source 7 as in FIG. The heat radiating part 5B of the heat pipe 5 terminates in the above-described non-grip regions B and D, and a graphite sheet 10 is connected to the heat radiating part 5B.
In this configuration, heat is diffused from the heat source 7 toward the non-grip regions B and D via the combination body 12, and heat conduction to the grip portion on the back surface of the protective case 3 is suppressed. Therefore, the high temperature abnormality of the heat source can be prevented, and the non-gripping portion is a heat radiating portion, so that even if the electronic device is used for a long time, heat is not easily transmitted to the hand, and the user does not feel uncomfortable. The combination body 12 is extremely thin, and the electronic device can be thinned and lightened.
In each of the above-described embodiments, the heat conducting member such as the heat pipe 5 and the graphite sheet 10 is attached to the inner surface of the protective case 3, but is not limited to this form, and the heat pipe 5 is directly attached to the back surface of the housing 20. It may be.

7A and 7B show another embodiment. In FIG. 7, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the above-described protective case 3 is not essential. And the heat pipe 5 is affixed on the back cover (case part) 14 of the housing 20. The heat pipe 5 is arranged in a slight gap δ formed between the housing 20 and the back cover 14, that is, a gap (0.3 to 1 mm) having a dimension equivalent to the thickness of the heat pipe 5. The heat pipe 5 is held in the gap δ between the housing 20 and the back cover 14 when the back cover 14 is attached to the main body. The heat receiving portion 5A of the heat pipe 5 is in contact with the surface corresponding to the heat source 7 as in FIG. The heat radiating part 5B of the heat pipe 5 is terminated in the region of the non-gripping part described above.

In this configuration, heat is diffused from the heat generating source 7 toward the non-gripping portion region via the heat pipe 5, and heat conduction to the gripping portion on the back surface of the back cover 14 is suppressed. Therefore, the high temperature abnormality of the heat generating source 7 can be prevented, and by making the non-gripping part a heat radiating part, heat is hardly transmitted to the hand, and the user does not feel uncomfortable. Unlike the above-described embodiments, the protective case 3 is not essential, so that the thickness and weight can be reduced accordingly.

In the above embodiment, the heat pipe 5 is pasted on the inner surface of the back cover 14, but the present invention is not limited to this configuration, and the heat pipe 5 may be pasted on the inner surface of the housing 20 by removing the back cover 14. As shown in FIG. 8, the heat receiving portion 5A of the heat pipe 5 is brought into contact with the surface corresponding to the heat source 7, and the heat radiating portion 5B of the heat pipe 5 is twisted on the side surface of the main body, You may make it terminate in the area | region of the non-grip part mentioned above along.

9A and 9B show another embodiment. In FIG. 9, the same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted.
In this embodiment, unlike the configuration of FIG. 4, the heat receiving portion 5 A of the heat pipe 5 does not overlap the heat source 7 and is disposed below the heat source 7. In this case, the gap a between the heat generation source 7 and the heat receiving portion 5A of the heat pipe 5 is set to be 10 mm or less, for example. This is because if the gap a exceeds 10 mm, the heat from the heat source 7 cannot be received efficiently by the heat receiving portion 5A. In addition, you may make it arrange | position a heat conductive sheet in the clearance gap a between the heat generating source 7 and the heat receiving part 5A.
The heat radiating part 5B of the heat pipe 5 extends away from the side edge of the surface corresponding to the battery 9, that is, avoids the battery 9, and terminates in the regions B and D of the non-gripping part described above.

In the present embodiment, since the heat receiving part 5A of the heat pipe 5 does not overlap the heat source 7, the heat receiving part 5A of the heat pipe 5 receives the heat of the heat source 7 in the vicinity of the heat source 7. With this configuration, the same effect as that of the embodiment shown in FIG. 4 can be obtained.
Similarly to the embodiment shown in FIG. 4, the heat radiating portion 5 B of the heat pipe 5 extends so as to avoid the surface corresponding to the battery 9, so that heat does not easily flow from the heat source 7 to the battery 9. Suitable for use in warm and tropical climates. According to this configuration, heat does not easily flow into the battery 9, and heat diffusion to the non-gripping portion is possible. Therefore, in use in a warm or tropical climate, the abnormal temperature rise of the battery 9 can be suppressed, and the life of the battery 9 can be extended.

10A and 10B show another embodiment. 10, the same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. In the present embodiment, the heat pipe 5 extends partially in contact with the side edge of the surface corresponding to the battery 9, is bent along the upper side and the side part of the protective case 3, and is not above the battery 9. It terminates in regions B and D of the grip part. That is, the heat pipe 5 is disposed over a wide range of the protective case 3.
In the present embodiment, the heat pipe 5 can be installed over a wide range of the protective case 3, and the heat source 7 can diffuse heat over a wide range of the protective case 3. Therefore, as in the above embodiments, the heat conduction to the grip portion on the back surface of the protective case 3 is suppressed, the electronic device can be made thin and light, and the heat source can be prevented from being abnormally hot. Moreover, since the non-gripping portion is the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.
In the present embodiment, if the battery 9 is a battery 9 having an NFC antenna therein, the heat pipe 5 is arranged as a reception auxiliary member for the NFC antenna by arranging the heat pipe 5 in a wide range of the protective case 3. Will work. Therefore, the reception sensitivity of the NFC antenna can be improved by the heat pipe 5.

11A and 11B show another embodiment. In FIG. 11, the same parts as those in FIG. 10 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. In the present embodiment, the heat pipe 5 extends partially in contact with the side edge of the surface corresponding to the battery 9, is bent above the protective case 3, and is a non-grip region B above the protective case 3. , D. That is, the heat pipe 5 is disposed over a wide range above the protective case 3.

Also in this embodiment, the heat pipe 5 can be installed over a wide range above the protective case 3, and the heat source 7 can diffuse heat over a wide range of the protective case 3. Therefore, as in the above embodiments, the heat conduction to the grip portion on the back surface of the protective case 3 is suppressed, the electronic device can be made thin and light, and the heat source can be prevented from being abnormally hot. Moreover, since the non-gripping portion is the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.
Further, in the present embodiment, if the battery 9 is a battery 9 having an NFC antenna therein, the heat pipe 5 is arranged in a wide range above the protective case 3 so that the heat pipe 5 can receive the NFC antenna. It will function as a member. Therefore, the reception sensitivity of the NFC antenna can be improved by the heat pipe 5.

12A and 12B show another embodiment. In FIG. 12, the same parts as those in FIG. 10 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. In the present embodiment, the heat pipe 5 extends partially in contact with the side edge of the surface corresponding to the battery 9, is bent along the upper side and the side part of the protective case 3, and is not above the battery 9. It terminates in regions B and D of the grip part. In the present embodiment, the heat pipe 5 is twisted above the protective case 3, and the heat pipe 5 is formed along the upper edge of the protective case 3.

Also in this embodiment, the heat pipe 5 can be installed over a wide range of the protective case 3, and the heat source 7 can diffuse heat over a wide range of the protective case 3. Therefore, as in the above embodiments, the heat conduction to the grip portion on the back surface of the protective case 3 is suppressed, the electronic device can be made thin and light, and the heat source can be prevented from being abnormally hot. Moreover, since the non-gripping portion is the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.
Further, in the present embodiment, if the battery 9 is a battery 9 having an NFC antenna therein, the heat pipe 5 is arranged in a wide range above the protective case 3 so that the heat pipe 5 can receive the NFC antenna. It will function as a member. Therefore, the reception sensitivity of the NFC antenna can be improved by the heat pipe 5.

13A and 13B show another embodiment. In FIG. 13, the same parts as those in FIG. 10 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. The heat pipe 5 extends partially in contact with the side edge of the battery 9, is bent along the upper side and the side part of the protective case 3, and is formed in a spiral shape above the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D.

In this configuration, heat is diffused from the heat source 7 toward the non-grip portion region via the heat pipe 5, and heat conduction to the grip portion on the back surface of the back cover 14 is suppressed. Therefore, the high temperature abnormality of the heat generating source 7 can be prevented, and by making the non-gripping portion the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.
Further, in the present embodiment, if the battery 9 is a battery 9 having an NFC antenna therein, the heat pipe 5 functions as an auxiliary reception member for the NFC antenna by forming the heat pipe 5 in a spiral shape. Become. Therefore, the reception sensitivity of the NFC antenna can be improved by the heat pipe 5.

14A and 14B show another embodiment. In FIG. 14, the same parts as those in FIG. 13 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap with the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. The heat pipe 5 extends partially in contact with the side edge of the battery 9, is bent along the upper side and the side part of the protective case 3, and is formed in a spiral shape above the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D.

In the present embodiment, the heat pipe 5 is configured to function as an NFC antenna. That is, the heat receiving part 5A and the heat radiating part 5B of the heat pipe 5 are respectively provided with electrodes 21 for taking out voltages, and these

electrodes

21 and 21 are NFC antennas (not shown) built in the battery 9. ) Electrode 22 via wiring 23. The NFC antenna of the battery 9 is connected to a reader / writer circuit (not shown). Thus, by connecting the NFC antenna inside the battery 9 and the heat pipe 5, it is possible to improve reception sensitivity.

Here, when the incoming radio wave is B (t) = Bcos (2nft), according to the law of electromagnetic induction,
V (t) = − NS {dB (t) / dt} cos θ = 2nfNSB cos θ · sin (2nft)
An electromotive force is generated and information is received.
Where B (t): time-varying magnetic field, B: magnetic field amplitude, f: frequency of incoming radio wave, t: time, V (t): AC voltage generated in the coil, S: cross-sectional area of the coil, N: coil Number of turns, θ: an angle formed by the coil surface and the arrival direction of the radio wave.
Therefore, it can be seen that the greater the number of turns of the coil, the higher the AC voltage and the higher the reception sensitivity.

In the present embodiment, by connecting the heat pipe 5 to the NFC antenna inside the battery 9 and forming the heat pipe 5 in a spiral shape, a large number of turns can be secured, and as a result, the impedance is increased. And an antenna with high reception sensitivity can be obtained. Thus, the reception sensitivity of the NFC antenna can be improved.
In addition, since the heat pipe 5, that is, the antenna and the battery 9 are configured as separate parts, even if a malfunction occurs in one of the heat pipes 5, it is only necessary to replace one of the malfunctions. The cost can be reduced as compared with the case of attachment.
Also in the present embodiment, as in each of the embodiments described above, heat diffuses from the heat source 7 toward the non-gripping portion region via the heat pipe 5, and is transferred to the gripping portion on the back surface of the back cover 14. Heat conduction is suppressed. Therefore, the high temperature abnormality of the heat generating source 7 can be prevented, and by making the non-gripping portion the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.

15A and 15B show another embodiment. In FIG. 15, the same parts as those in FIG. 13 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5 A of the heat pipe 5 is disposed at a position away from the heat source 7. Similarly to the configuration shown in FIG. 13, the heat pipe 5 is partly in contact with the side edge of the battery 9 and is formed in a spiral shape while being bent along the outer periphery of the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D.

In this configuration, the heat generated from the heat source 7 is not directly diffused by the heat pipe 5, but the heat inside the housing is indirectly diffused by indirectly diffusing the heat inside the housing. It is something that can be done.
Similarly to the embodiment shown in FIG. 13, the heat inside the housing is soaked through the heat pipe 5 so that the heat is diffused toward the region of the non-gripping portion, and the back surface of the back cover 14 The heat conduction to the grip portion is suppressed. Therefore, the high temperature abnormality of the heat generating source 7 can be prevented, and by making the non-gripping portion the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.
Further, in the present embodiment, if the battery 9 is a battery 9 having an NFC antenna therein, the heat pipe 5 functions as an auxiliary reception member for the NFC antenna by forming the heat pipe 5 in a spiral shape. Become. Therefore, the reception sensitivity of the NFC antenna can be improved by the heat pipe 5.

16A and 16B show another embodiment. In FIG. 16, the same parts as those in FIG. 15 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5 A of the heat pipe 5 is disposed at a position away from the heat source 7. Similarly to the configuration shown in FIG. 13, the heat pipe 5 is partly in contact with the side edge of the battery 9 and is formed in a spiral shape while being bent along the outer periphery of the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D.

electrodes

In the present embodiment, by connecting the heat pipe 5 to the NFC antenna inside the battery 9 and forming the heat pipe 5 in a spiral shape, a large number of turns can be secured, and as a result, the impedance is increased. And an antenna with high reception sensitivity can be obtained. Thus, the reception sensitivity of the NFC antenna can be improved.
In addition, since the heat pipe 5, that is, the antenna and the battery 9 are configured as separate parts, even if a malfunction occurs in one of the heat pipes 5, it is only necessary to replace one of the malfunctions. The cost can be reduced as compared with the case of attachment.
Also in this embodiment, similarly to each of the above embodiments, the heat inside the casing is soaked through the heat pipe 5, and the heat is diffused toward the region of the non-gripping portion. Heat conduction to the gripping portion on the back surface of 14 is suppressed. Therefore, the high temperature abnormality of the heat generating source 7 can be prevented, and by making the non-gripping portion the heat radiating portion 5B, it is difficult for heat to be transmitted to the hand, and the user does not feel uncomfortable.

17A and 17B show another embodiment. In FIG. 17, the same parts as those in FIG. 13 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap with the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. The heat pipe 5 extends partially in contact with the side edge of the battery 9, is bent along the upper side and the side part of the protective case 3, and is formed in a spiral shape above the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D. In the present embodiment, the heat pipe 5 is twisted at the side of the protective case 3, and the heat pipe 5 is formed along both side edges and the upper edge of the protective case 3.

18A and 18B show another embodiment. In FIG. 18, the same parts as those in FIG. 17 are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the heat receiving portion 5A of the heat pipe 5 is disposed so as to be in contact with and overlap with the central portion of the surface corresponding to the heat source 7 as in the configuration of FIG. The heat pipe 5 extends partially in contact with the side edge of the battery 9, is bent along the upper side and the side part of the protective case 3, and is formed in a spiral shape above the battery 9. The heat radiating portion 5B of the heat pipe 5 extends to the center position of the surface corresponding to the battery 9, and terminates in the above-described non-grip regions B and D. In the present embodiment, the heat pipe 5 is twisted at the side of the protective case 3, and the heat pipe 5 is formed along both side edges and the upper edge of the protective case 3.

electrodes

In the embodiment shown in FIGS. 9 to 18, the example in which the heat pipe 5 is attached to the protective case 3 has been described. However, as shown in FIG. 7, the heat pipe 5 is attached directly to the back surface of the housing. May be. In this case, the above-described protective case 3 is not essential, and the heat pipe 5 is directly attached to the back cover (case part) 14 of the housing 20.
Further, the graphite sheet shown in FIG. 5 may be adhered to the inner surface of the protective case 3 together with the heat pipe 5.
In the embodiment shown in FIGS. 13, 15, and 17, the heat pipe 5 is connected to an NFC antenna built in the battery 9 so as to function as an NFC antenna. Even when the antenna is not incorporated, the heat pipe 5 may function as a single NFC antenna.

As mentioned above, in each embodiment, although the case where the smart phone 1 was used as a mobile electronic device was demonstrated, this invention is called a "smart device" which mounted a computer in plate-shaped housings, such as a tablet terminal and a mobile phone, for example. Suitable for devices and the like.

1 Smartphone (electronic equipment)
3 Protective case (case part)
5 Heat pipe (heat conduction member)
5A Heat receiving part 5B Heat radiating part 7 Heat source 9 Battery 10 Graphite sheet (heat conducting member)
12 Combination body 14 Back cover (case part)
20

Housing

21, 22 Electrode

Claims

A thin heat conducting member is disposed in a gap between the casing of the electronic device and the case portion provided on the back of the casing, the heat receiving portion is disposed on the surface corresponding to the heat source, and the heat radiating portion is disposed on the non-gripping portion. A mobile electronic device case characterized by comprising.
The mobile electronic device case according to claim 1, wherein the heat conducting member functions as a reception assisting member of an NFC antenna built in the electronic device.
3. The mobile electronic device case according to claim 1, wherein the heat conducting member functions as an NFC antenna.
The mobile electronic device case according to claim 1, wherein the heat conducting member is attached to either the casing or the case portion.
The mobile electronic device case according to any one of claims 1 to 4, wherein the case portion is a back cover of the housing.
The mobile electronic device case according to any one of claims 1 to 4, wherein the case portion is an external protective case.
The mobile electronic device case according to any one of claims 1 to 6, wherein the heat dissipating part is disposed on a surface corresponding to a battery.
The mobile electronic device case according to any one of claims 1 to 6, wherein the heat dissipating part is arranged avoiding a surface corresponding to a battery.
The mobile electronic device case according to any one of claims 1 to 8, wherein the heat conducting member is a heat pipe.
The mobile electronic device case according to any one of claims 1 to 8, wherein the heat conducting member is a graphite sheet.
The mobile electronic device case according to any one of claims 1 to 8, wherein the heat conducting member is graphene.
The mobile electronic device case according to any one of claims 1 to 8, wherein the heat conducting member is a metal plate.
The mobile electronic device case according to any one of claims 1 to 8, wherein the heat conducting member is a combination of a plurality of heat conducting members.