JP2016092371A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that limits heat radiation to a portion to be touched by a user.SOLUTION: A centrum is provided in a case cover to alleviate a portion to be touched by a user of locally becoming hot. A high-heat conductive component is provided inside the case to make a temperature of an appearance part to be uniform.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a heat dissipation structure for a housing of an electronic device.

  Some electronic devices such as cameras and smartphones generate heat when a semiconductor element mounted on a substrate is activated. When the temperature of the semiconductor element increases, there is a problem such as deterioration or destruction of performance. Therefore, it is necessary to prevent the heat of the semiconductor element from radiating to the outside of the electronic device to increase the temperature. Therefore, there is an electronic device having a structure that dissipates heat by transmitting heat from a heat generating part to the outside of the device using a metal or a highly heat conductive resin component (Patent Document 1).

JP 2010-141133 A

  However, in Patent Document 1, it can be considered that the user feels uncomfortable because the exterior cover near the heat source becomes hot.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device that restricts heat radiation to a location touched by a user.

  In order to achieve the above object, an electronic device according to the present invention includes an exterior member that covers the outer periphery of the electronic device, an electronic component that generates heat that is covered with the exterior member, and the exterior member includes a first wall that forms an appearance. The electronic device has a second wall that covers the electronic component, and is characterized in that a hollow portion is provided between the first wall and the second wall. Another feature of the present invention is that it has ribs that block the hollow portion, and the ribs are provided sparsely in the vicinity of the electronic component, and the ribs are closely spaced as the distance increases. To do.

  Another feature of the electronic device according to the present invention is that the heat transfer wall is made of a material having a higher thermal conductivity than the material forming the first or second wall along the second wall on the side surface of the hollow portion. Is provided.

  Another feature of the electronic device according to the present invention is that a rib of a material forming the first wall or the second wall is provided in the vicinity of the electronic component, and the first wall as the distance from the electronic component increases. Alternatively, a rib made of a material having a higher thermal conductivity than the material forming the second wall is provided.

  Another feature of the electronic apparatus according to the present invention is that the electronic component is a battery.

  ADVANTAGE OF THE INVENTION According to this invention, provision of the electronic device which restrict | limited the temperature rise of the location which a user contacts by providing a hollow part inside an exterior cover is realizable.

Example perspective view Example perspective view Example perspective view Example perspective view Example perspective view Example cross section Example cross section Cross section of conventional example

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<First Embodiment>
(Outline of imaging device)
FIG. 1 is a perspective view of a video camera, which is an embodiment of an electronic apparatus according to the present invention, as viewed from the front direction (subject side). FIG. 2 shows a perspective view of the present embodiment as viewed from the rear (photographer side). An imaging lens 101 is provided in front of the video camera body 100 (subject side). At the back (photographer side), there is an image display unit 102 for confirming a photographed image, which is composed of a liquid crystal panel of about 3 inches, an organic EL, or the like. There is a battery housing unit 103 connected to the video camera main body 100, which is a separate housing from the video camera main body 100. A battery serving as a driving power source for the video camera can be stored in the battery storage unit 103. The battery storage unit 103 is mainly composed of three covers, an upper surface, a center portion, and a lower surface.

  On the upper surface is an operation cover 104 having an operation unit such as a trigger switch. At the center is a battery housing cover 105 that covers the outer periphery of the battery housing. A battery storage lid 106 can be opened and closed on the lower surface, and the battery can be attached and detached by opening the battery storage lid 106. The battery storage unit 103 also serves as a grip during shooting. FIG. 3 is a perspective view of the position of the hand when the battery storage unit 103 is gripped. When grasped with the right hand and held as shown in FIG. 3, the tip of the index finger becomes a position where the trigger switch 107 can be operated. 4 is a range in which the user contacts when gripping as the grip portion 105a in the battery storage unit cover 105. Further, the shaded location shown in FIG. 5 in the battery storage unit cover 105 is a range where the user does not contact when gripped by the non-grip unit 105b.

(Explanation of heat dissipation structure and hollow)
FIG. 6 is a cross-sectional view of the battery storage unit 103. 6A shows a state in which the battery 108 is housed in the battery housing portion 103, FIG. 6B shows a state in which the battery 108 is not housed in the battery housing portion 103, FIG. (C) is a diagram of the battery 108 only. As shown in FIG. 6A, the battery housing cover 105 that covers the battery 108 is formed as an integral part that covers the outer periphery of the battery. Such an integral part covering the appearance can be created using a 3D printer or the like. As shown in FIG. 6B, the battery housing portion cover 105 has a shape of a battery housing hole 109 for housing the battery inside.

  As shown in FIG. 6C, a battery 108 for driving and a battery cell 111 are built in the battery 108. A semiconductor element 112 is mounted on the battery substrate 110. On one of the external sides of the battery housing cover 105, there is a grip portion 105a that the user touches as shown in FIG. On the other hand, there is a range that is not gripped by the user of the non-grip portion 105b shown in FIG. When the battery 108 is used, the semiconductor element 112 on the battery substrate 110 generates heat. The battery storage hole 109 has a battery storage wall 105e surrounding the battery. The heat of the battery 108 is transmitted to the outside through the battery housing cover 105. At that time, since the grip portion 105a is a portion touched by the user, it feels uncomfortable at a high temperature.

  In FIG. 6A, the heat transfer path and temperature are schematically shown by arrows. Dotted arrows indicate the heat transfer path from the heat source. The solid line arrow shown in the appearance indicates a temperature rise on the appearance surface. A portion with a long arrow indicates that the temperature rise is large, and a portion with a short arrow indicates that the temperature rise is small. A hollow portion 113 is provided between the grip portion 105a and the battery storage wall 105e. Thereby, the heat transfer path (dotted arrow) from the semiconductor element 112 of the heat generation source to the grip portion 105a extends, so that the grip portion 105a near the heat generation source hardly transmits heat. Further, heat is easily transmitted to the non-grip portion 105b side that is not gripped because the heat transfer path to the appearance is shorter than the grip portion 105a side.

  FIG. 8 shows the temperature rise when there is no hollow. Compared to FIG. 8, the grip portion 105a of FIG. 6A having a hollow portion has a moderate temperature rise near the heat source. As a result, the effect obtained by the first embodiment is that the side gripped by the user in the vicinity of the heat generation source is hard to rise due to the hollow structure, and the heat can be efficiently dissipated only to the side not gripped by the user. It can be gripped without feeling.

<Second Embodiment>
(Explanation of heat dissipation structure and high thermal conductivity member)
FIG. 7 is a cross-sectional view of the battery storage unit 103, and a second embodiment of the battery storage unit cover 105 of FIG. 6 will be described. The battery storage unit cover 105 is an external part, and is also made of a polycarbonate material having a low thermal conductivity because it also serves as a grip part 105a that the user contacts. Inside the battery housing cover 105, an aluminum material 114 is buried around the entire circumference. An aluminum material 114 is disposed in the hollow portion 113 along the wall (105e) side of the battery housing hole 109. By embedding an aluminum material having a higher thermal conductivity than that of the external polycarbonate material, heat is easily transferred to the whole. Further, since the grip portion 105a has the hollow portion 113 between the aluminum material 114, heat is hardly transmitted to the grip portion 105a.

  The hollow portion 113 is provided with ribs (115c, 115d) that connect the grip portion 105a and the wall (105e) of the battery housing hole 109. Thereby, the strength when the grip portion 105a receives an external force is increased. A rib 115c made of polycarbonate material is disposed at a location near the heat source. The ribs of the polycarbonate material and the ribs of the aluminum material are alternately arranged as the distance from the heat source is increased, and a large number of the ribs 115d of the aluminum material are disposed at a location far from the heat source. This makes it difficult for heat to be transferred to the grip part 105a due to the rib of the material having low thermal conductivity in the high temperature part close to the heat source, and as the distance from the heat source, heat is transferred to the grip part 105a by the rib of material having high thermal conductivity. As a result, the temperature rise of the appearance becomes uniform.

  Although not shown, all ribs are made of the same material, and the rib spacing is sparsely arranged near the heat source, and the temperature is similarly uniform even if the ribs are spaced closer to the heat source. The effect of conversion is obtained.

  Therefore, the effect obtained by the second embodiment is to improve the thermal conductivity by embedding a member with high thermal conductivity to ensure heat dissipation, while ensuring the strength by adding ribs, from the heat source. By making the temperature uniform by changing the material of the rib of the hollow portion depending on the distance, it is possible to prevent a local temperature rise of the grip portion.

  As described above, as described in the embodiment of the present invention, in the present invention, the portion gripped by the user can be gripped without feeling uncomfortable without increasing the temperature by forming the hollow structure.

100 video camera body, 101 imaging lens, 102 image display, 103 battery compartment,
104 Operation cover, 105 Battery compartment cover, 106 Battery compartment cover,
107 trigger switch, 108 battery, 109 battery compartment, 110 battery board,
111 Battery cell, 112 Semiconductor element, 113 Hollow part, 114 Aluminum material, 115 Rib

Claims (5)

In an electronic device composed of an exterior member (105) covering the outer periphery of the electronic device, and a heat generating electronic component (112) covered with the exterior member (105),
The exterior member (105) has a first wall (105a) that forms an appearance and a second wall (105e) that covers the electronic component,
An electronic device comprising a hollow portion (113) provided between a first wall (105a) and a second wall (105e). It has ribs (115) that block the hollow part (113), and the gaps between the ribs (115c, 115d) are set closer to the electronic component (112), and the gaps between the ribs (115c, 115d) become closer as the distance increases. The electronic device according to claim 1, wherein the electronic device is provided. A heat transfer wall (114) made of a material having a higher thermal conductivity than the material forming the first or second wall is provided along the second wall (105e) on the side surface of the hollow portion (113). The electronic device according to claim 1 or 2. A rib (115c) of the material forming the first wall or the second wall is provided near the electronic component (112), and the first wall or the second wall is formed as the distance from the electronic component (112) increases. The electronic apparatus according to claim 3, wherein the rib (115d) is made of a material having a higher thermal conductivity than the material to be processed. The electronic device according to any one of claims 1 to 4, wherein the electronic component (112) is a battery (108).